Vatican City

Vatican City, formally the State of the Vatican City, is a landlocked sovereign state enclosed within the city of Rome, on the west bank of the Tiber. At roughly 0.44 square kilometres, it is the smallest internationally recognized state in the world. It functions as the territorial base of the central government of the Catholic Church, the Holy See, and the two terms are often conflated. The entry explains why they are distinct: the Holy See is a juridical entity whose history reaches back to the early Christian era, while Vatican City is the geographic state created by the Italian treaty of 1929.

The state matters beyond its size. It contains St Peter's Basilica, the Sistine Chapel and some of the most important art collections in Europe, and its heritage is recognized by UNESCO. Its head of state is the pope, who holds executive, legislative and judicial authority within the walls. Through the Holy See, it maintains diplomatic relations with many countries and takes part in international affairs as a permanent observer at the United Nations.

The entry traces the state from its origins at the tomb of St Peter and the Papal States, through the "Roman Question" and the Lateran Treaty, to its present institutions. It then covers geography, governance, population, diplomacy, infrastructure, extraterritorial property, heritage, finance, science, relations with Italy, national symbols, and the questions that remain open about the state's future.

Definition and legal status

Two entities under one name

The term "Holy See" refers to the composite of the authority, jurisdiction, and sovereignty vested in the Pope and his advisers to direct the worldwide Catholic Church. In practice it covers the pope together with the offices that assist him, such as the Roman Curia and the College of Cardinals, and it is not the pope alone. Vatican City, by contrast, is a territorial state of about 0.44 square kilometres. It was set up as a separate entity under the Lateran Treaties of 1929. The Holy See is the institution, and Vatican City is the territory that provides its physical base. The two are legally distinct, even though one person, the pope, heads both.

International legal personality

The Holy See is a subject of international law in its own right. Its status is traditionally traced back to the Middle Ages and is independent of the former Papal State and of today's State of the Vatican City. Scholars have difficulty placing it in standard categories. It is neither a conventional state nor simply an international organization, so its personality is usually described as sui generis. Some authorities argue that its standing rests on custom and on the recognition extended by other states, while others point to the 1929 settlement as the point at which its status was clarified.

The Holy See can make binding agreements with other states, which are called concordats, and it can send and receive diplomatic representatives. Its envoys are called nuncios rather than ambassadors, a title meant to reflect the spiritual character of the mission. The Vatican City State, however, does not conduct diplomacy on its own account. Unlike the Holy See, it does not receive or send diplomatic representatives, and the Holy See acts on its behalf in international affairs. When agreements are concluded for the state, the Holy See uses a formula stating that it acts on behalf and in the interest of the State of Vatican City.

How states recognize the Holy See

Governments do not establish relations with the city. They establish relations with the Holy See. The Lateran Treaty itself provides that diplomatic relations with the Holy See are governed by the rules of international law. Although the Holy See, as distinct from the Vatican City State, does not fulfill the long-established criteria in international law of statehood, its possession of full legal personality is shown by the fact that it maintains diplomatic relations with 180 states. Figures vary slightly between sources, and the count changes as relations are opened or suspended. Recognition is therefore the mechanism by which the Holy See's international standing is confirmed in practice.

An ecclesiastical state and its legal order

Vatican City is often described as an ecclesiastical state because its institutions are built around the Church. Its legal system is rooted in law of the Church. It has its own legislative competence and legal system, based on canon law, although not all of canon law applies within the state, and in some areas supplementary rules apply. The state has its own legislation and its own civil, penal and administrative courts. Church law and civil law therefore interact in a layered way: canon law provides the foundational framework, while the state's own statutes and, in certain matters, Italian law fill the remaining gaps. In marriage, for example, canon law governs ecclesiastical marriage, while the Vatican has its own rules for civil registration.

The overlap is also visible in personnel. Several judges on the state's Court of Appeal also sit on the Roman Rota, the Church's tribunal, which reflects the state's dependence on the Holy See's institutions.

Why the two are confused, and how their histories differ

The confusion arises because the state was created to serve the Holy See, and because the same person holds the highest office in both. The histories are also different. The Holy See's diplomatic activity predates the modern state by a long way. Since the fourth century, and well before the constitution of the Papal States, the Apostolic See has sent and received diplomatic missions.

The Papal States, which the popes governed as temporal rulers, ended in 1870 when Rome was annexed to the Kingdom of Italy. When the House of Savoy completed Italian unity in 1870 by the occupation of Rome, depriving the Holy See of all political authority in the process, a bitter feud followed between the State and the Church. The loss of territory raised the question of whether the Holy See still had international standing. Some scholars argued that the papacy's personality lapsed for the period between 1870 and 1929, leaving only a quasi-international position based on custom. The United States, for instance, suspended diplomatic relations with the Holy See when it lost the Papal States.

The Lateran Treaty of 11 February 1929, signed by Cardinal Pietro Gasparri for the Holy See and by Benito Mussolini for Italy, resolved this dispute. It created Vatican City as a sovereign territory so that the Holy See could be independent in its mission. The result was a dual structure: a non-territorial religious sovereign with ancient roots, and a small territorial state founded in 1929 to host it. That structure explains both the frequent conflation of the two and the careful distinction that legal scholars and diplomats maintain between them.

Location, boundaries and area

Vatican City is a landlocked enclave surrounded by Rome, the Italian capital, and is situated on the west bank of the Tiber River. It has no seacoast. It has no access to the open sea, and it is fully enclosed by Italy. Because every land border is shared with Italy, the state depends on Italian territory for all overland access, a dependence discussed in the sections on infrastructure and Italian relations.

Its size is stated in several ways, and the figures do not agree. A figure of 0.44 km² was long repeated: a 1930 almanac gave that value, and a 1945–46 edition corrected it to 0.49 km². The figure of 0.44 km² is still widely cited by many sources despite its inaccuracy. Other reference works use 49 hectares, which matches the corrected value. Either way, the state is the smallest sovereign state in the world by area. Around half of its land is taken up by the Vatican Gardens, which comprise about half of the total area of Vatican City.

The perimeter is around 3.2 km. Sources cite a perimeter of only 3.2 km, and one describes the Vatican boundary as the World's shortest entire boundary. Other estimates run slightly higher, to about 3.4 km, and the border with Italy is given as 3.5 km in some geographic summaries. The differences come from the measuring methods used, so the figures should be read as approximations.

Walls and the boundary line

The boundary is defined mainly by masonry rather than by natural features. Since the site has no rivers or mountains within it, the limits rest on fortifications and legal agreements. The city's boundaries are formed by medieval and Renaissance walls, except on the southeast side at St. Peter's Square. The square is therefore the one open edge, lying where the ground meets the colonnade of Bernini's piazza.

The oldest and most important section is the Leonine Wall. Pope Leo IV ordered its construction after raids by Saracen forces. The walls were consecrated by Pope Leo IV on 27 June 852 to defend St. Peter's Basilica and the surrounding Borgo district from Saracen raids. The wall dating to the ninth century, forms the south and west boundary of Vatican City. Its height was considerable: sources describe the Leonine walls as 39-foot high. The fortifications did not remain fixed. The walls were continually expanded and modified through to the reign of Pope Urban VIII in the 1640s. Part of the Leonine Wall still runs through the Vatican Gardens. The wall also served as an escape route, and popes fleeing persecution have escaped from Vatican City through a passageway on the top of the wall.

Entrances and controlled access

The state's boundary is crossed at a small number of gates. Sources differ on the total. One reference counts five controlled entrances guarded by the Pontifical Swiss Guard and the Gendarmerie Corps. Another gives 6 entrances to Vatican City, but the main entrance to Vatican City is Saint Peter's Square. Among the named gates, Porta Santa Anna is one of the main entrances used by residents and workers of the Vatican. Porta San Pellegrino is different in character. It was rebuilt by Pope Alexander VI in 1492, and the gate is little used.

In practice, the boundary is controlled in layers rather than sealed. The walls are not a barrier to the public across the whole site. St. Peter's Square is ordinarily wide open to anyone who wants to walk in, through, or around it. Inside the walls, though, the remainder of the Vatican—the offices, the gardens, the palaces—are walled off, with very restricted public access. Guards at the gates check entry. The gates are manned by Swiss Guards, who will stop any tourist seeking to wander inside. Access to the gardens and other restricted areas requires the proper credentials, such as a press pass or an academic affiliation, and a short conversation with a member of the Swiss Guard. Security work is shared with Italian authorities: their protection is supplemented with assistance from Italian police. The Gendarmerie covers day-to-day policing, and the Bronze Door, which is the main entrance to the Apostolic Palace, is closed to the public during a conclave.

Terrain, geology and landscape

The state occupies part of Vatican Hill (Mons Vaticanus), which rises on the western bank of the Tiber, opposite ...

Climate and local environment

The Vatican shares the climate of Rome, which falls within the Mediterranean category. Rome and its metropolitan area has a Mediterranean climate (Köppen climate classification: Csa), with mild winters and hot summers. Rainfall follows a pronounced seasonal split. Summers are hot and markedly dry, winters are mild, and almost all of the rain falls outside the summer. Rome averages about 892 mm of precipitation a year; November is usually the wettest month (126 mm) and July the driest (21 mm). In summer, average temperatures between 27°C (81°F) and 32°C (90°F) from June to August, peaking in August at over 35°C (95°F) are typical, while snow is uncommon in the city itself.

Long-run records point to a warming trend that bears directly on the enclave. Over the full record (since 1940), the annual mean temperature in Rome has risen by 2.2°C between its first decade and its last. Days above 30°C have grown noticeably more frequent, from around 55 a year in the first decade to about 80 in the last. Urban heat, air quality and traffic pressure come mainly from the dense built fabric of the city and the vehicle flows of the wider metropolitan area. The state's few hectares sit inside this fabric and cannot isolate themselves from it. Among the environmental hazards named for the Sistine Chapel, automotive exhaust stands out, alongside the heat, humidity and dust that crowds introduce.

The Vatican Gardens are the principal green space and the most visible form of landscape management. The Vatican Gardens occupy almost half of the 44 acres that constitute the Vatican City State. A more recent survey gives the gardens a larger extent: today's Vatican Gardens are spread over nearly 23 hectares (57 acres), containing medieval fortifications, buildings and monuments from the 9th century to the present day, set among flower beds and topiary, green lawns and a 3 hectares (7 acres) patch of forest. The planting mixes Mediterranean species with imported ones. There is an olive tree donated from Israel as a sign of inter-faith peace, papyrus plants from Egypt, Asian Tamarisks, and Jerusalem thorns. Historical planting has a long record: Pope Nicholas III Orsini, when he transferred the papal residence from the Lateran to the Vatican between 1277 and 1280, also commissioned an orchard and a proper viridarium, which doubled as a source of produce for the papal kitchen. Later popes added exotic specimens, and at the end of the eighteenth century, Napoleon's troops plundered much of the Vatican Gardens, destroying large areas of greenery. After 1929, architect Giuseppe Momo alongside botanist Giovanni Nicolini managed in four years to overhaul the garden's physiognomy into what is visible today.

Maintenance now follows organic and manual principles where possible. A small monastery garden, for example, is overseen by the Gardens and Environment Service, and irrigation remains entirely manual to this day. Pest control relies on low-toxicity methods. Good agricultural practices also reduce the need for plant-protection products, since the number and activity of pests are kept below the threshold at which they can cause damage. In the wider garden, a 2017 restoration study opted for non-toxic and environmentally friendly products, such as oregano (Origanum vulgare) and thyme (Thymus vulgaris), along with other plant protection products used individually or combined.

The most pressing environmental risk to the state's cultural holdings is the interaction between visitors and interior climate. The Sistine Chapel offers the clearest case. Officials said the powder consisted of calcium carbonate and calcium bicarbonate deposits, believed to have formed from the increasing levels of carbon dioxide and humidity passing through the chapel's porous plaster walls. Officials first noticed the deposit in 2010, and the patina was easily removed and no permanent damage occurred, although officials warned that such calcium buildup can do lasting damage if left untreated. Visitor numbers reported in different sources vary: one account puts the chapel's almost 5.5 million annual visitors as adding dust and humidity, while another cites nearly six million visitors to the chapel every year. The response has been technical. Sensors and cameras count visitors, and the state of the art ventilation system... uses three cameras that estimate the number of people in the chapel so the temperature and humidity inside could be adjusted according to these numbers. The system targets a temperature ranging between 20 to 25 degrees Celsius with 50 to 60 percent humidity, and filtration aims to keep dust low.

Origins: St Peter's tomb and the early Christian centre

Tradition holds that the Apostle Peter was executed in Rome during Nero's persecution and buried on the slopes of Vatican Hill, close to the circus where the killings took place. A grave was dug on the southern slopes of the Vatican hill, right in front of the circus that was the scene of persecutions against Christians at the time of Emperor Nero. Its underground chamber was simple: an underground vault, approached from the road by a descending staircase, with the body resting in a stone sarcophagus at the centre. The burial place soon attracted devotion. It immediately became a place of worship and pilgrimage for early Christians, despite the risk of ferocious persecution.

Veneration took a monumental form in the later second century. A century after the Apostle's martyrdom, a small funerary aedicule was built, which the priest Gaius recorded at the end of the second century, and this structure became known as the Trophy of Gaius. Its exact survival and identification remain debated, and the claim that the tomb holds Peter's remains has never been conclusively proven. Constantine later enclosed the trophy within a marble casket, which Eusebius of Caesarea described as a splendid tomb to which innumerable hordes flocked from every part of the Roman empire.

Constantine's building programme, which transformed the site, is dated differently across sources. The necropolis below the basilica was covered by Constantine around 320 to level the ground for a basilica commemorating Peter's tomb, while other accounts place the main construction in the 320s. One source gives 324 as the year Constantine built a lavish basilica over the entire cemetery and part of the circus, while another gives 326 to 333 as the period of construction, with completion around thirty years later. Engineers had to fill the burial ground to create a level platform. This filled the necropolis with soil and building debris, with the exception of St. Peter's tomb, which was preserved. The basilica's high altar was positioned above the tomb itself, and the circus had to be dismantled to make room for the church, and many tombs were removed and reburied.

The Old St Peter's Basilica became the most important church in Rome for more than a millennium. Its ceremonies and its pilgrim traffic gave the Vatican Hill a status that rivalled the older papal church. Papal coronations and other religious ceremonies took place there, and Charlemagne was crowned Emperor of the Holy Roman Empire within its walls in 800.

Until the fourteenth century, however, the popes' main residence was not on the Vatican. Constantine had given the Lateran property to the bishops of Rome in the early fourth century, and the Lateran Palace became the principal papal seat for roughly a thousand years. From the fourth century, the palace was the principal residence of the popes until the Apostolic Residence moved to the nearby Vatican. The Lateran basilica also kept its status as the cathedral of Rome. The Lateran, not St Peter's in the Vatican, is the cathedral of Rome, and the popes' formal authority remained tied to it even after they left.

The shift to the Vatican came in stages. The popes lived at the Lateran from the fourth century until the papacy moved to Avignon, France, in 1309. During the Avignon period, the Lateran suffered serious damage. Two fires, in 1309 and 1361, badly damaged the Lateran complex. When the papacy returned to Rome in 1377, the Vatican became the usual residence, although the Lateran remained the cathedral. The popes first lived at Santa Maria in Trastevere and then at Santa Maria Maggiore, as the Vatican Palace had fallen into disrepair from lack of upkeep. The Avignon papacy lasted nearly seventy years, and during that time the Lateran palace's use as a papal residence ended.

The medieval Vatican complex developed in the fifteenth century. In 1447, Pope Nicholas V razed the ancient fortified palace of Eugene III to erect a new building, the foundation of the current Apostolic Palace. This rebuilding preceded the Renaissance works that turned the Vatican into the centre of papal government, and the later reconstruction of St Peter's under Michelangelo and others. Medieval Rome itself was a city in decline and contention. The Vatican's ascent as the papal seat therefore reflected both the damage done to the Lateran and the growing importance of the shrine of St Peter, which drew the Catholic Church's attention to the Vatican Hill.

Papal States and the Roman Question

For more than a thousand years the popes governed a temporal realm of their own in central Italy. Its origin is usually traced to the Donation of Pepin in 756, and the Papal States lasted until 1870. At their greatest extent, around 1789, they included exclaves in southern Italy and in France, and by 1850 their core territory was divided into the legations of Rome, Romagna, the Marche, Umbria and Marittima e Campagna. Papal rule was interrupted by French occupation in 1798–1800 and again in 1809–1814, when the pope was held in exile. After 1849 French troops protected the papal government, and their presence produced a system of shared governance with local papal authorities that lasted until the end of the regime.

The unification of Italy, the Risorgimento, ended this arrangement. In 1859 the Kingdom of Sardinia invaded the papal territories and set up a military government in the Romagna, which was annexed after a plebiscite in 1860. The rest of the state, including Lazio and Rome, remained under papal control for another decade, protected by French soldiers. When France went to war with Prussia in the summer of 1870, Napoleon III withdrew his troops from the peninsula. Italian forces then entered the Papal States in September. Pius IX ordered a token defence of the city, which he meant to show that Italy was taking Rome by force rather than by consent. On 20 September 1870 Italian troops entered the city through a breach near the Porta Pia. An October plebiscite then approved the annexation of Rome and Lazio to the Kingdom of Italy. Rome became the national capital, which completed the unification. Pius IX withdrew into the Vatican palace and described himself as a prisoner.

The Italian parliament answered the papal position with the Law of Guarantees (Legge delle Guarentigie), passed on 13 May 1871. The law gave the pope personal inviolability, honours similar to those of the king, and an annual state grant of roughly 3.25 million lire. It also guaranteed papal ownership of the Vatican, the Lateran and Castel Gandolfo, freedom of conclaves and councils, and the right of foreign envoys to be accredited to the Holy See. Accounts differ on its legal character. One reading holds that it made the pope a subject of the Italian state rather than an independent sovereign; another holds that it recognised him as an independent sovereign for diplomatic purposes. The popes rejected it for a more basic reason. A law passed by the Italian parliament could be revoked at will, and it carried no international recognition, so it could not restore the pope's sovereignty. Pius IX refused the money in his encyclical Ubi nos of May 1871, and his successors never accepted the law or touched the funds set aside for them.

The dispute that followed is known as the Roman Question. It was a conflict between the papacy and the Italian state over the temporal power of the pope, and it lasted from 1870 until 1929, roughly sixty years. Its effects spread far beyond the question of territory. The popes refused to appear on the balcony of St Peter's facing the square, gave the Urbi et Orbi blessing from a balcony overlooking a courtyard instead, and held papal coronations in the Sistine Chapel. Catholics were discouraged by a 1868 decree (non expedit) from taking part in national elections, which kept Catholic politics at a distance from the Liberal state for decades. Historians often describe a tacit arrangement after 1870 under which neither side interfered with the other, but the underlying conflict remained a constant strain on Italian politics. For the Church, the loss of its armies and territory forced a rethinking of how a universal spiritual authority could exercise power without secular force.

The Roman Question was settled by the Lateran Pacts of 11 February 1929. Negotiations had begun in 1926, and the agreement was signed by Cardinal Pietro Gasparri for Pius XI and by Benito Mussolini for the Italian crown. The treaty's preamble describes the question as considered "definitively and irrevocably" settled. The Law of Guarantees was formally abrogated by the Lateran Treaty. The Lateran settlement created Vatican City as an independent state, and its three instruments are discussed in the next section.

Lateran Treaty and the creation of the state

The arrangements that ended the Roman Question were concluded as a package known as the Lateran Pacts. Talks opened in 1926, with Cardinal Pietro Gasparri, Pius XI's secretary of state, speaking for the papacy, and Mussolini's government handling the Italian side. Formal negotiations began in 1926, involving Mussolini and Cardinal Secretary of State Pietro Gasparri, representing Pope Pius XI. The instruments were signed in the Lateran Palace on 11 February 1929, and the Italian legislature approved them in June that year. The Italian Parliament ratified them on 7 June 1929. Presentation differs by source: the website of the Holy See presents the financial convention as an annex of the treaty of conciliation, considering the pacts as two documents, while other accounts count three separate instruments.

The three components covered different subjects. One instrument addressed the status of the papacy, another set out compensation for lost lands, and the third regulated religious life in Italy. A diplomatic accord recognizing the Vatican's sovereignty, a financial settlement compensating the papacy for its lost territories, and a concordat that defined the relationship between the Catholic Church and the Italian government. The treaty of conciliation is the document that gave the papacy a territory it could govern as a sovereign state. The treaty of conciliation, with 27 articles, recognised the full sovereignty of the Holy See in the State of Vatican City, which was thereby established, accompanied by four annexes, including maps of the territory and of buildings with extraterritorial privileges.

The financial convention was a settlement shaped by Italy's weak economy. The pope reduced his legal claim for compensation, and the Holy See accepted 750 million lire in cash together with 1 billion lire in five percent government bonds. In view of Italy's economic situation, the pope reduced his legitimate claims for indemnity and settled for 750 million lire in cash and 1 billion lire in 5 percent negotiable government bonds. The total was also below what Italy had offered in 1871. While the amount was less than the original 1871 offer, it symbolized the resolution of the longstanding financial claims. Payment had to be completed by 30 June 1929, and it was shielded from tariffs and taxes. The treaty also gave Catholicism a privileged public position. The conciliation treaty essentially established official diplomatic relations between the Vatican and Italy and affirmed Catholicism as the "state religion."

The concordat, which had a preamble and 45 articles, was intended to set out in detail how religion and the Church would operate within Italy. The concordat, with a preamble and 45 articles, accompanied the treaty as a necessary complement and sought to regulate in detail the status of religion and the Church in Italy. It protected the Church's spiritual authority and its public worship, and it let the Holy See communicate with the Catholic world. It guaranteed to the Church free exercise of its spiritual power and free, public exercise of worship. The rights of the Holy See to communicate freely with the Catholic world and to publish instructions in any language were admitted. Priests were given a role in religious instruction in state schools, and the state accepted church marriages as legally valid. The concordat gave the Vatican power over religious teaching in public schools at both the primary and secondary school levels (taught by priests); extended papal control over marriage laws and wills. The state had also agreed that church marriages be recognized as valid by the state.

The concordat was revised in 1984, when the agreement had become outdated in several areas. After more than 16 years of negotiations, Italy and the Vatican today signed a revised concordat, or church-state agreement, curtailing the Roman Catholic Church's privileges here in accordance with the increasingly secular nature of Italian society. The revised text took effect on 3 June 1985. The revised Concordat consists of a Preamble, 14 Articles and an Additional Protocol which is to be regarded as an integral part of the agreement. The 1984 changes removed Catholicism's standing as the state religion. Both sides declared: "The principle of the Catholic religion as the sole religion of the Italian State, originally referred to by the Lateran Pacts, shall be considered to be no longer in force." The revision did not alter the Vatican's international status. Although the status of the Vatican as a sovereign state was unaffected by the concordat, the document served to establish the independence of the Italian state from the Holy See, and thereby from the Catholic Church.

In Italy's constitutional order, the pacts retain a special position. The post-World War II Constitution of the Italian Republic, adopted in 1948, states that relations between the State and the Catholic Church "are regulated by the Lateran Treaties". The 1984 accord was ratified by the Italian Parliament on 25 March 1985, and it establishes that the pacts can be modified by common agreement of the two Parties without requiring any procedure of Constitutional revision.

Government and legal system

Sovereign power and its delegation

On May 13, 2023, Pope Francis issued a new "Fundamental Law of the Vatican City State" which came into force on June 7, 2023. This law completely replaces the previous one of John Paul II. The text keeps the principle that the pope holds the whole range of state power. The Fundamental Law describes the Supreme Pontiff as sovereign of Vatican City State, holding the fullness of legislative, executive, and judicial powers. In practice, the pope delegates most of this authority to a variety of organs within the Vatican City, all of whose members may be appointed or removed at the discretion of the Pope. Because the structure does not operate on a separation of powers, as all authority ultimately rests with the ruler. Under the 2023 text, the bodies are described by their functions rather than as holders of power: power is reserved to the pope while other entities are assigned only functions.

Legislative and administrative bodies

Legislation is entrusted to the Pontifical Commission for Vatican City State. This commission was established in 1939 by Pope Pius XII. Its members have changed over time: the commission was formerly made up of a cardinal president and other cardinals, but the new law allows "other members" may also be designated in the commission, including lay men and women. Its acts still require the sovereign's consent. Laws passed by this body must be submitted for papal approval before publication. Laws of the pope, whether issued directly or through delegated organs, take several forms, including acts and regulations for the VCS, apostolic constitutions, and conventions and agreements with other states.

Daily administration rests with the Governatorato. There is a government of the state that rests with the President of the Governatorato, who in turn is the President of the Pontifical Commission. The commission's three-year financial plan goes directly for the approval of the Supreme Pontiff rather than passing through the economic bodies or the Secretariat of State, as the earlier law required.

Courts and applicable law

The judiciary is layered. It consists of a sole judge with limited jurisdiction, a tribunal with four members, the Court of Appeal with four members, and the Court of Cassation, which has three members and is the supreme court of the Vatican City State. Judgments are issued in the name of the Supreme Pontiff.

Vatican law is distinct from canon law, though the two interact. The Fundamental Law is a civil state ordinance rather than a set of canonical norms, but canon law can serve as a means of interpreting the laws of the Vatican state. Matters concerning the Church are governed by canon law, while judicial matters outside the Church are dealt with by the Italian judiciary in Rome. Italian law therefore enters the Vatican legal order in specific areas rather than as a general source, a point that the sources consulted for this section describe only briefly.

Security forces

The Pontifical Swiss Guard was founded by Pope Julius II in 1506 to protect the pope and his residence. Its size was increased from 110 to 135 in 2015 in response to increased demand for their services. Its duties include accompanying the pope on trips, guarding access to Vatican City and protecting the College of Cardinals during papal transitions, including the conclave.

Overall law enforcement belongs to a separate force. Though the Guard serve as watchmen of Vatican City, the overall security and law enforcement of the city-state is conducted by the Corps of Gendarmerie of Vatican City. The Gendarmerie was founded in 1816 as the Corps of Gendarmes by Pope Pius VII. In 1970 it was transformed into a Central Security Office, with the duties of protecting the Pope, defending Vatican City, and providing police and security services within its territory. The two forces cooperate at the gates: the Swiss Guard, in cooperation with the Corps of Gendarmerie of Vatican City, controls access to the entrances to the city-state.

Sede vacante

During a vacancy of the papacy, ordinary governance is held to a minimum. Canon 335 provides that "[w]hen the Roman See is vacant (Sede Vacante) or entirely impeded, nothing is to be altered in the governance of the universal Church; the special laws issued for these circumstances, however, are to be observed." The civil power of the pope over Vatican City State passes to the College of Cardinals, solely for the dispatch of ordinary business and of matters which cannot be postponed, and for the preparation of everything necessary for the election of the new Pontiff. The college may not administer matters which "pertain to the Supreme Pontiff during his lifetime or in the exercise of his office; such matters are to be reserved completely and exclusively to the future Pope".

The camerlengo has a central practical role. The Cardinal Camerlengo is charged with managing the properties of the Holy See, and the Major Penitentiary continues to exercise his normal role. If either has to do something which normally requires the assent of the pope, he has to submit it to the College of Cardinals. Some popular accounts go further and describe the camerlengo as acting as the Vatican City head of state during the vacancy, but the canonical framework places decisions with the college as a whole.

Population, citizenship and language

The state's own statistics for 31 December 2024 count 673 citizens and 882 residents, the latter including non-citizens. Vatican City State currently has 673 citizens, 458 of whom live inside the walls (including 120 members of the Pontifical Swiss Guard). Residents of the State (both citizens and non-citizens): 882. About 30 per cent of citizens therefore live in other countries, mostly because of diplomatic posts.Some 30% of Vatican citizens thus do not reside inside the State, but in other countries, mostly because of their specific functions (in particular diplomatic employees). Other compilations differ. One demographic reference gives a 2026 estimate of about 506 residents, while general travel and reference sites usually round the total to around 800.At just 49 hectares (121 acres) and with a population of around 800, Vatican City is the smallest sovereign state on Earth. The spread of figures reflects differences in what is counted (citizens, non-citizen residents, or people physically present) and in the date of counting.

The resident community is made up mainly of clergy, members of religious communities, lay employees of the state, and the Swiss Guard, together with their families.The population of Vatican City includes clergy, religious members, lay employees of the state (like the Swiss Guard), and their families. In 2013, 13 families of Holy See employees lived in Vatican City, and by 2019, 20 children of Swiss Guards resided there. The working population is far larger than the resident one. Most staff commute in from Rome and other Italian towns each day, and one estimate puts total Vatican employment at about 4,800.Although the Vatican workforce is large for such a small territory—around 4,800 employees—the vast majority live in Rome or elsewhere in Italy rather than inside the city-state.

Citizenship is tied to office rather than to birth or descent. Qualifying employment does not confer the status automatically; a formal application is required.Unlike regulations governing nationality of other countries, Vatican citizenship is acquired primarily after being appointed to an office associated with the Holy See. Citizenship must be obtained by application and cannot be acquired automatically by virtue of holding a qualifying position. The main categories are cardinals resident in the state or in Rome, Holy See diplomats, and people who live in the state because of their service, including members of the Swiss Guard.Under Vatican law, citizenship is granted to three main categories of people: 1. The Cardinals resident in the Vatican City State or in Rome 2. The Holy See's diplomats 3. Persons who reside in Vatican City State by reason of their office or service (including members of the Swiss Guard) Relatives who share a citizen's household may also receive the status. Loss follows the end of the qualifying role. Children lose it on reaching adulthood unless they obtain separate permission to stay, and cardinals who settle outside Rome lose it.Upon reaching age 18, children of a Vatican citizen automatically cease to hold Vatican citizenship and must apply for continued residence permission at that time if desired. Cardinals who become domiciled outside of Vatican City or Rome also lose Vatican citizenship. Anyone who would otherwise be left stateless after losing the status receives Italian nationality by operation of law.Any person who loses Vatican citizenship and would otherwise become stateless automatically acquires Italian nationality. Many holders keep a second passport, typically Italian or Swiss.Most of these individuals hold dual citizenship, often retaining their original nationality, such as Italian or Swiss. Non-citizens can also live in the state under a separate status created in 2011, which allows both temporary and permanent residence.Vatican City also has some residents who have the right to live in the city state but do not have a citizenship. Some of these residents are temporary while others are permanent. It was only established in 2011 following a new law enacted by Pope Benedict the 16th called the "law concerning citizenship, residency and access".

Language use follows a division of function. Italian is the working language of the state, while Latin remains the language of papal documents and liturgy.Vatican City uses Italian in its official documents and as its main working language. Vatican ordinances are published in Italian, whereas Holy See documents are issued mainly in Latin.Ordinances of Vatican City are published in Italian; official documents of the Holy See are issued mainly in Latin. Latin is also used for legal proclamations and liturgical ceremonies.It is the official language for Church documents, liturgical ceremonies, and legal proclamations. Reference works differ on formal status: one lists Italian as the sole official language, and describes Latin as the de jure language of the Holy See.Official languages: Italian. National language: Italian (de facto) Latin (de jure as the official language of the Holy See) Commands to the Swiss Guard are traditionally given in Swiss German.Hence, the official documents are written in Latin, the legislation and official communications are carried out in Italian, while Swiss German is the language used for giving commands to the Swiss Guard. Official communication is also multilingual. The Holy See's newspaper appears in seven languages, and Vatican News is available in more than thirty.The Holy See's official newspaper is published in seven languages: Italian, English, French, German, Polish, Portuguese and Spanish. The Vatican News website is available in over 30 languages so it's accessible to Catholics from all corners of the globe.

The nationalities of the resident community reflect the Church's international character. The most frequently listed nationalities are Italian, Swiss, American and Peruvian.Major ethnic: Italians; Swiss people; Americans; Peruvians; The Swiss Guard has its own entry criteria. Recruits must be Swiss citizens, unmarried and Catholic, and aged between about 19 and 30.They are all Swiss citizens, and they must be unmarried, Roman Catholic, and between the ages of 19 and 30. The Church's reach extends well beyond Rome: it has roughly 1.3 billion followers, and the election of Karol Wojtyła as pope in 1978 ended an Italian succession that had lasted since the sixteenth century.In 1978, Cardinal Karol Wojtyla became the first non-Italian incumbent of the Papacy since the 16th century, taking the title of John Paul II. Although the community is multinational, it is religiously uniform, since every citizen, resident and place of worship in the state is Catholic.All citizens, residents and places of worship are Catholic.

Diplomacy and international status

Diplomatic network

Diplomacy is conducted by the Holy See, the sovereign entity that governs the Catholic Church, rather than by the city-state itself. The Holy See is the universal government of the Catholic Church, and its headquarters are located in Vatican City. Its foreign service has a long pedigree: papal envoys, now known as nuncios, have represented the Holy See to foreign rulers since the fifth century, long before the founding of Vatican City State in 1929. A 2018 Vatican note recorded 183 States that currently have diplomatic relations with the Holy See, and that figure has been cited in later summaries as well.

The highest-level mission is the apostolic nunciature. It functions in a manner similar to an embassy, although nunciatures do not issue visas and do not maintain consulates. The nuncio, who holds the rank of ambassador extraordinary and plenipotentiary, is usually a titular archbishop. Some nuncios also cover intergovernmental bodies; the European Union and ASEAN are notable examples. In a number of countries with diplomatic relations with the Holy See, the apostolic nuncio serves ex officio as the doyen of the diplomatic corps.

Where relations are absent, the Holy See uses lesser channels. Papal representatives known as apostolic delegates ensure contact between the Holy See and the Catholic Church in countries that do not have diplomatic relations with the Holy See. The clearest case is China: the Holy See is represented in Taipei by an apostolic nunciature, headed not by a nuncio but by a chargé d'affaires, reflecting the "one China" policy that leaves mainland China without a papal representative.

United Nations status

The Holy See is not a member of the United Nations, but it has held a special observer position since 1964. It was granted permanent observer state status on 6 April 1964, and in that capacity, it has the right to attend all sessions of the General Assembly, the Security Council, and the Economic and Social Council. The limits are deliberate. It cannot, however, cast a vote, cosponsor draft decisions or resolutions, make points of order or exercise the right of reply. Earlier, the Holy See had reservations about full membership, reasoning that it would not seem to be consonant with the provisions of Article 24 of the Lateran Treaty, particularly as regards spiritual status and participation in possible use of force.

The status was strengthened in 2004, when the status of the Holy See at the United Nations was affirmed and strengthened by the General Assembly on 16 July 2004. Among the UN's observers, the Holy See is one of only two permanent non-member observer states, the other being Palestine. The post is still filled by a diplomat with the rank of nuncio: in July 2026, Pope Leo XIV appointed Archbishop Christophe-Zakhia El-Kassis as the Holy See's new Permanent Observer to the United Nations (UN) in New York.

Neutrality and mediation

The Holy See's foreign policy is built on neutrality, which Vatican officials describe in terms that go beyond simple non-alignment. Under Pope Francis, the approach was framed as a strategy of "positive neutrality," which allows it to dialogue with all sides. Francis also stressed that this is not ethical neutrality, especially in the face of human suffering. Decisions on whether to speak publicly, propose mediation or stay quiet are reportedly taken at the top: the final decision rests with the Pope, whose judgment determines whether the Holy See will issue a statement, propose mediation, or remain diplomatically silent.

Neutrality has produced practical results in some disputes. The Holy See's most cited success is the Beagle Channel dispute, in which it has successfully mediated or contributed to ending wars such as Chile–Argentina (1984). Scholars have argued that the Holy See was effective in its mediation efforts due to its perceived neutral status. Yet the approach is not without critics. During the war in Ukraine, Pope Francis and the Holy See have sought to remain in the good graces of both Ukraine and Russia, a stance that has drawn criticism from both sides of the conflict. The Holy See also does not always intervene: in some crises, it has called for an end to the violence without publicly offering its services, partly because it has not been invited or offered.

Legal standing and sovereignty

The Holy See's international standing rests on a distinct legal foundation. Diplomatic activity runs through the Holy See rather than through Vatican City, which is the territory it administers. The Holy See's sovereignty is therefore understood as a personality in international law that predates the small territory it controls. The 1929 Lateran arrangements made the territory a state, but the papacy had exercised sovereign functions for centuries before that, including through the Papal States.

Its status is generally regarded as sui generis. The Holy See is recognized as a subject of international law and engages in treaties, diplomatic relations and multilateral participation, yet it is not a conventional member state and is excluded from full UN membership and voting. Commentators therefore debate how far its sovereignty is limited, and how international law should classify an entity whose territory is tiny but whose diplomatic reach is global.

Infrastructure and public services

Vatican City runs most everyday services itself, though it depends on Italy for much of its physical supply. Its telephone service dates from 1930, when a first exchange paid for by American Catholic donors began serving about 360 users. By 2020, the Vatican Telephone Service had transitioned to a modern IP Multimedia Subsystem, connecting approximately 5,000 phone terminals. Because the state has no mobile operators of its own, mobile connectivity within the state is primarily provided through Italian mobile networks. The telecommunications network is therefore internal in its switching but external in its wireless coverage.

The postal service was set up in 1929 under the Lateran accords, and the same body handled the state's telegraph traffic. The city has a post office that issues its own stamps and a bank that issues currency as well as Vatican automobile license plates. Its broadcaster, Vatican Radio, is the official broadcasting service of Vatican City; its first transmission was dated to 12 February 1931. Programmes are carried via short wave, FM and satellite. Its radio broadcasts are heard in some 40 languages in many parts of the world. The state also operates its own banking system, which is one of the institutions most often cited as evidence of its separate legal personality.

The pharmacy, Farmacia Vaticana, was founded in 1874 by a Fatebenefratelli friar. After 1929 it moved to its present site in the Palazzo Belvedere, and unlike Italian pharmacies, the Vatican Pharmacy will fill foreign prescriptions. Its own sources describe it as very busy, while Italian drug-approval procedures mean that the pharmacy often has medicines months to years before Italian pharmacies.

Railway

The Vatican Railway is the state's most distinctive piece of transport infrastructure. Under the 1929 treaty, Italy guaranteed to construct a railway station in Vatican City and link it to the nearby St. Peter's station in Rome. The station was designed by Giuseppe Momo, and the line crosses a purpose-built viaduct; outside the Vatican's walls, the rail line crosses atop a purpose-built rail viaduct. Construction began in 1929 and the line opened in 1934, although the first trial locomotive crossing of the Italian-Vatican border occurred in 1932.

Sources give differing figures for the length of track inside the state. One states that the section of the line within Vatican City comprises only one station and 300 metres (980 ft) of track, making it the shortest national railway system in the world. Another puts the in-state section at about 200 metres of a total of 1.27 km. The boundary is physically marked by an iron gate in the city walls separate the Vatican City and Italian sections, and the gate is only opened for trains to pass through. Management is divided accordingly: the part that ran within the walls of Vatican City would be managed by the Holy See, while the remaining track, on Italian territory, would be managed by Italian National Railways.

Traffic is mainly freight. The line is used primarily as a means of importing goods into Vatican City, various Popes have made personal use of it during pilgrimages and other official business. Regular passenger service is limited; one source notes that there are no regularly scheduled passenger services to or from the Vatican City.

Energy, water and road access

The 1929 treaty set the basic arrangement for utilities. Italy undertook to ensure that adequate supply of the water in its possession is fully assured to Vatican City. The Holy See, for its part, agreed to arrange the existing means of access to the Vatican, and those others which it may consider necessary to open in the future, at its own expense. Rules for vehicles and aircraft on Italian soil were left to later agreements. In practice, the Vatican City receives subsidies from the Italian state, which include the water supply free of charge, tax exemptions and other kinds of dedicated public funding. Electricity is mostly bought from Italy, while electric power and water services from Rome supplemented by a local water supply, and a small electric power plant provide partial local backup. Almost all supplies—including food, water, electricity, and gas—must be imported.

The most significant recent change is a planned solar installation. A bilateral agreement signed in 2025 would create an agrivoltaic plant on Holy See land outside Rome, with an expected capacity of 80 to 90 megawatts. Implementation began after Italy's ratification of the bilateral agreement signed in 2025. Any surplus electricity would be supplied to Italy. Because the Vatican Radio site already enjoys exemptions, the project would inherit the Vatican Radio site's exemptions from Italian taxes and public charges.

Internal transport and logistics

Goods reach the state through a small number of controlled points. Freight is received at the rail gate, and the station still houses a goods import-export office which still exists today. Road traffic moves through the city's gates, where the sovereign authority of the Holy See applies, and the state's Vatican automobile license plates identify vehicles registered within the state. Because the city's inventory is largely imported, the coordination of these flows between Italian suppliers and the Vatican's own offices forms a substantial part of daily administration.

Extraterritorial properties and institutions beyond the city

Because Vatican City itself is so small, a number of Holy See institutions sit on Italian soil. Their legal status comes from the Lateran Treaty of 1929, which gave certain properties in Italy a privileged position. Several departments, offices and property belonging to the Holy See, most notably the summer papal residence of Castel Gandolfo and the major basilicas, are situated in buildings around Rome.

The papal basilicas in Rome

The best-known group is the set of papal basilicas. Saint John Lateran serves as the seat of the bishop of Rome and head of the worldwide Catholic Church, and it lies outside Vatican City proper, approximately four kilometres northwest of the Vatican. Despite that distance, as properties of the Holy See, the archbasilica and its adjoining edifices enjoy an extraterritorial status from Italy. The list also includes Santa Maria Maggiore and San Paolo fuori le Mura, along with the complexes attached to them, such as the Scala Sancta and the Palazzo della Cancelleria. Together these form part of the Historic Centre of Rome, which was inscribed as a World Heritage site under the name the Properties of the Holy See in that City Enjoying Extraterritorial Rights and San Paolo Fuori le Mura. Some counts go further: one Catholic reference work notes that more than ten such buildings and their grounds enjoy extraterritorial rights.

Castel Gandolfo

The papal summer residence at Castel Gandolfo, in the Alban Hills, is the most significant property outside Rome. The Pontifical Villas are buildings erected in an area of about 55 hectares, included among the extraterritorial areas of the Holy See in Italy. The palace was built for Urban VIII in the 1620s, and the popes used it as a retreat from then on. The palace and the adjoining Villa Barberini, which Pope Pius XI added to the complex, have been extraterritorial properties of the Holy See since the signing of the 1929 Lateran Treaty with Italy. Between 1870 and 1929 the popes did not use the residence, and no pope visited Castel Gandolfo due to political tensions with the Italian state. The main palace was opened to the public as a museum in 2016, but it has been restored as the summer residence once again. Administration of the villas falls to an independent department of the Governorate of Vatican City, the Directorate of Papal Villas.

Radio transmission and other Holy See sites

Vatican Radio is the clearest example of an operational facility outside the state. It was established in 1931 and began broadcasting on February 12, 1931, opening with a message from Pope Pius XI. Lack of space led the Holy See to look further afield. It acquired a site located 18 kilometres north of Rome at Santa Maria di Galeria, and the Italian Republic granted the site extraterritorial status in 1952. Other sources date the land transfer to an agreement in 1951, and give the site's area as 430 hectares rather than 400, so the exact figures vary between references. Construction began in 1954, and in 1957 the new broadcasting center was placed in operation. The site also has been a source of friction. Local residents have claimed that the radiation from the site harmed their health, a claim the station does not accept. Because the area lies outside Italian jurisdiction, these transmitters are not subject to the Italian laws that limit the radiation that a radio station can emit. In 2024 Pope Francis decreed that the site would host a solar farm to supply power to the radio operations and to Vatican City itself. The properties have been integrated into the Vatican postal and telecommunications system.

The legal basis of extraterritoriality

The 1929 treaty defines these sites through a status that resembles the one enjoyed by foreign diplomatic missions. It defines the properties which, despite being part of Italian territory, enjoy immunities recognized by international law for the residences of diplomatic representatives of foreign states. In practice, this means the Holy See holds the properties while Italian authorities have limited reach inside them. The Castel Gandolfo palace, for example, is therefore not under the jurisdiction of Castel Gandolfo or Italy, even though it sits next to the town. Public order in the extraterritorial possessions is the responsibility of the Vatican Gendarmerie. Taken together, these areas cover more ground than the state itself: the total area of the extraterritorial possessions significantly exceeds the area of Vatican City. The two sites outside Rome, Castel Gandolfo and Santa Maria di Galeria, account for most of that total.

Cultural heritage and museums

Vatican City covers only about 44 hectares, yet it holds one of the densest concentrations of art and archaeology in the world. UNESCO describes the site as a one of the most sacred places in Christendom, and its art is concentrated in a few buildings: Christian basilica, papal palace, museum galleries and library. The site covers 44 hectares, and the figure is useful for seeing how much is packed into so little ground.

At the centre is St Peter's Basilica. Its building, erected over the tomb of St Peter the Apostle, drew on the work of Bramante, Raphael, Michelangelo, Gian Lorenzo Bernini and Maderna. Within the Apostolic Palace, the Sistine Chapel is best known for the ceiling and the Last Judgment that Michelangelo painted, while the Raphael Rooms display the frescoes that Raphael and his students executed for the papal apartments. UNESCO's inscription also points to earlier decorative schemes, such as the chapel of Nicholas V, decorated by Fra Angelico, and the Borgia apartments, decorated by Pinturicchio, which show how the complex developed over several centuries of papal patronage.

The Vatican Museums grew out of papal collecting. Pope Julius II purchased the sculpture Laocoön and His Sons, which became the first acquisition of the Vatican Museums. Julius displayed his collection to the public in 1506, after the Hellenistic group had been found that year on the Esquiline Hill. The Pio-Clementine Museum, with its Greek and Roman sculpture, followed, and the Braccio Nuovo opened in 1822 with more than 150 sculptures. Pope Gregory XVI later created two specialised institutions: the Gregorian Etruscan Museum in 1837, filled with finds from excavations in southern Etruria, and the Gregorian Egyptian Museum in 1839. The Egyptian holdings include sculptures of pharaohs and deities, sarcophagi, mummies and funerary objects, while the Etruscan collection includes vases, bronzes and sarcophagi. Taken together, the museums are said to show around 20,000 works on display, with more than 50,000 more kept in storage, a balance that makes the museum complex both a public gallery and a research resource.

The Vatican Apostolic Library, which is founded in the 15th century, is the other great holding. It has a collection of about 150,000 manuscripts and 1.6 million printed books, many of which date from pre-Christian and early Christian times. Its manuscripts include the Codex Vaticanus, one of the oldest surviving Greek manuscripts of the Bible. Scholars in theology, history, science, philosophy and linguistics continue to use these holdings, and the library's manuscripts are therefore part of the site's justification for World Heritage status, not only a private archive.

Vatican City was added to the World Heritage List in 1984 under cultural criteria (i), (ii), (iv) and (vi). Criterion (vi) links the site to the tomb of St Peter and to the history of Christianity, and criterion (i) refers to the continuous creation of artistic ensembles over several centuries. The agencies responsible for managing the site, as recorded in the UNESCO documentation, are the Secretariat of State and the administration of the Apostolic Palace. Conservation of frescoes, marble sculpture, manuscripts and printed volumes thus falls to Vatican offices, which must balance preservation against the large numbers of visitors who enter the museums each year. These issues are discussed further in the section on tourism pressure and environmental threats.

Economy and public finance

The Holy See and the state of Vatican City do not have a conventional tax base, so their income comes from a mix of voluntary giving, cultural sales and financial activity. Published figures differ by source and by the entity they cover. The Catholic Church's central administration is funded separately from the territorial state's own accounts. One reporting example notes that the Holy See's consolidated accounts mostly exclude the Government of the Vatican City State, which is responsible for administering the physical territory, including income such as that from the Vatican Museums, and also exclude the Institute for the Works of Religion. Any single total therefore needs to be read with its scope in mind.

Tourism is the most visible source of earned income. In 2024 the Vatican Museums welcomed about seven million visitors and booked ticket and souvenir sales approaching $100 million. Admission fees to the museums are supplemented by sales of postage stamps, coins and medals, tourist souvenirs and publications, which are the main commercial lines of the state's economy. Vatican euro coins in particular are highly sought by collectors because of their rarity, so philatelic and numismatic sales have a weight out of proportion to the small number of coins issued. The commercial base is narrow, and the state's finances are sensitive to visitor numbers. In the pandemic years, with ticket sales down 75% the Vatican lost an estimated $100 million.

Voluntary giving remains central to the Holy See's budget. The annual papal collection known as Peter's Pence dates back to the eighth century and represents money received from donations by Catholics around the world, given to the Pope on an annual basis. In 2023 its fund received 52 million euros, of which 48.4 million came from offerings and 3.6 million from financial income, while expenditures totalled 109.4 million euros. Dioceses supplied most of the income, some 31.2 million euros, or 64.4 percent. The United States was the largest single donor. Most of the fund's disbursements go to the Holy See's own work, while a smaller share supports direct aid to projects in many countries. Observers have noted that much of this giving comes from wealthier countries where Catholic populations are shrinking, which raises questions about the long-term base.

On the expenditure side, the administration resembles a large public bureaucracy. About sixty per cent of outlays go on wages, pensions and the running costs of the Roman Curia, a workforce of some three thousand lay employees plus several hundred clergy. Recent reporting states that the combined accounts of the Holy See showed a deficit of €83 million in 2024, despite higher museum takings.

The Institute for the Works of Religion (IOR), commonly called the "Vatican Bank", is a separate financial institution with its own profile. It is not a private bank, as there are no owners or shareholders; it has been established in the form of a juridical canonical foundation. It was founded in 1942 under Pius XII, who absorbed into it the pre-existing "Administration for the Works of Religion". According to its 2024 accounts, the institute reported a net profit of €32.8 million for 2024, up 7% compared to 2023, and its net assets were about €731.9 million. Its activities have narrowed: it is not a "bank" in the strict sense of the term and no longer offers credit to its users. Its profits are directed to the Holy See's mission and charitable work.

Financial oversight was rebuilt in stages from 2013 onward, when Pope Francis issued laws to bring HS/VCS structures in line with international and European legal standards. The central supervisory body is the Supervisory and Financial Information Authority (ASIF), which handles the prevention of money laundering, the financing of terrorism and the financing of proliferation of weapons of mass destruction. In 2026 Pope Leo XIV signed a new statute for ASIF that eliminates the agency's president and board and replaces them with a director and deputy director, both appointed by the pope for five-year terms. Under the new rules, the agency's annual and financial reports will now go to the Vatican's Council for the Economy for approval.

The currency is the euro, under a European Union arrangement rather than EU membership. The European Community, represented by the Italian Republic in association with the Commission and the ECB, concluded on 29 December 2000 a Monetary Agreement with the Vatican City State. Before the euro, Vatican monetary matters were governed by a bilateral convention with Italy concluded in 1991. Under the current agreement, the state must not issue any banknote, coin or monetary surrogate of any kind unless the conditions for such issuance have been agreed with the European Union. The annual ceiling on coin issuance is set by a joint committee, which in 2025 established the annual ceiling for the issuance and circulation of euro coins. The coins are minted by the Istituto Poligrafico e Zecca dello Stato of the Italian Republic, and at least half of each year's issue must enter circulation at face value, with the remainder available for collectors.

Science and scholarship

Scientific and scholarly work connected with the Holy See is carried out through a small set of institutions, most of them in Vatican City or at Castel Gandolfo. Their history reaches back to the Renaissance and is closely tied to the catholic-church's long patronage of learning.

The Vatican Observatory

Papal astronomy dates to the early 17th century, when Pope Gregory XIII took an interest in the sky during the Copernican controversies. Pope Leo XIII formally re-founded the Specola Vaticana (Vatican Observatory) in 1891, partly to answer claims that the Church and science were in conflict. Its instruments were housed in the Vatican for decades, but by the 1930s the city's lights had begun to blot out the fainter stars, and in 1935 Pius XI moved the observatory to the papal summer residence at Castel Gandolfo, some 25 kilometers southeast of Rome in the Alban Hills. The new site was staffed by Jesuit scientists, and a group of young Jesuit physicists set up a Spectrochemical Lab to measure the colors of gases important in the spectra of stars; they also founded the journal Spectrochimica Acta.

Light pollution again forced a change of location. In 1980 the observatory established a new division in Tucson, Arizona, and its Vatican Advanced Technology Telescope, dedicated in 1993, is based there. The headquarters at Castel Gandolfo moved in 2009 to a new building in the Papal Gardens there. Research results are published in international journals, and the observatory also publishes the Studi Galileiani, a series of current research on Galileo and the Copernican controversies. Its library at Castel Gandolfo holds rare antique books, including works by Copernicus, Galileo, Newton and Kepler, along with a meteorite collection used in studies of the early solar system.

The Pontifical Academy of Sciences

The academy traces its origin to the Accademia dei Lincei, founded in Rome on 17 August 1603 as the first exclusively scientific academy in the world by Federico Cesi and three companions. The academy appointed Galileo Galilei as a member on 25 August 1610. It closed after Cesi died in 1630. In 1847 Pope Pius IX reestablished the academy as the Pontifical Academy of the New Lynxes. After the Italian kingdom took Rome in 1870, the lineage split: a national academy (the Lincei) was created in Italy, and the papal body continued separately. Pope Pius XI renewed and reconstituted the academy in 1936 and gave it its present name.

The academy is the only supranational academy of sciences in the world. It is an independent entity within the Holy See, and its statutes define its mission as promoting the mathematical, physical and natural sciences and the study of related epistemological problems. Its work covers six areas, from fundamental science to bioethics and epistemology. Its headquarters is the Casina Pio IV in the Vatican Gardens. The Pontifical Academy of Social Sciences, founded in 1994 under John Paul II, is a separate body with a similar advisory and scholarly role in the social sciences.

The Vatican Apostolic Library

The library's roots go back to the mid-15th century. Nicholas V decided that Latin, Greek and Hebrew manuscripts held by the Vatican should be open for consultation by scholars. Its formal establishment came with a papal bull of 15 June 1475 issued under Sixtus IV. In 1481 the first librarian, Platina, produced an inventory of 3,500 items, which made it one of the largest public libraries in the Western world at the time. Its holdings are broad rather than confessional: only about 5% of the Renaissance manuscripts relate to religion, and the library is primarily a center of humanistic research with strengths in mathematics and the sciences. Its collections span literature, history, art, law, astronomy, mathematics, the natural sciences, medicine, liturgy, patristics and theology.

Digitization has widened access. In 2014 the Vatican launched an initiative to put its ancient manuscripts online, and more than 20,000 digitized manuscripts were freely available by 2025, including scientific manuscripts by Galileo. Published figures for the total number of manuscripts vary considerably between sources, from around 75,000 to over 180,000.

Galileo and the Church

The relationship between the Holy See and the scientific revolution is most often illustrated by the case of Galileo. The Holy Office warned him in 1616 against defending the Copernican view that the Earth moves around the Sun. In 1633 he was tried, found suspect of heresy, forced to recant, and placed under house arrest for the rest of his life. In 1992 John Paul II publicly acknowledged that theologians and churchmen had erred in the affair, and the case has since become a standard reference point in debates about faith and scientific inquiry.

Relations with Italy and Rome

Shared borders and daily contact

Because Vatican City is an enclave inside Rome, almost every route into it runs through Italian streets, so the state's relations with Italy are constant and practical. Visitors, clergy, staff and deliveries cross into the state every day, and policing is divided between the Vatican Gendarmerie inside the walls and Italian police on the adjacent streets, with coordination between the two forces. The state's own gates and checks are covered in the sections on boundaries and government.

Post, stamps and currency

The 1929 treaty required Italy to help the Holy See set up telegraph, telephone, wireless and postal links, and it shall further provide for direct connection with other States by means of telegraph, telephone, wireless, broadcasting, and postal services in the Vatican City. The Vatican post office opened two days after the treaty was signed, with supplies and equipment donated by the Italian government. Under a later postal agreement, Vatican City and Italy signed a postal agreement, going into effect on 1 August, providing for the routing of its mail through Rome. The state's first stamps, the "Conciliation" series, appeared on 1 August 1929 as a definitive series known to collectors as the "Conciliation issue."

The two postal systems remain separate. Stamps of Italy may not be used on Vatican mail, nor vice versa. Sources differ on how far Vatican mail enters the Italian system. One account says letters and packages originating in Vatican City do not generally enter the Italian mailstream at all, while another states that the Italian postal services takes over after collection. Monetary relations are governed by a separate arrangement: with the exception of its gold and silver coins, Vatican coins have legal tender even in Italy and in all other countries, by virtue of the Monetary Agreement with the Italian State. In April 2026, the Governorate also signed a memorandum with Italy's state mint, a renewable three-year agreement covering numismatic and philatelic production.

Constitutional recognition in Italy

The Lateran Pacts have a formal place in Italian constitutional law. Article 7 of the Italian Constitution states that the state and the Catholic Church are each independent and sovereign within their own order, and that their relationships are regulated by the Lateran Pacts. The constitution also provides that amendments to the Pacts accepted by both parties shall not require the procedure of constitutional amendments. This is why the 1984 revision could be made by agreement rather than by constitutional change. That revision ended the status of Catholicism as the sole state religion of Italy, while the Vatican remained a distinct sovereign entity. The same Pacts also shape the state's own law, since Italian law applies in a supplementary manner in Vatican City, subject to canon law, the Lateran treaty and the concordat.

Via della Conciliazione and the urban form of Rome

The boulevard that links Rome's centre to St Peter's Square is the clearest physical mark of the relationship on the city's map. Roughly 500 metres in length, it connects Saint Peter's Square to the Castel Sant'Angelo on the western bank of the Tiber River. Plans for a grand route between the Vatican and central Rome date back centuries, and the first design was submitted by Leone Battista Alberti during the reign of Pope Nicholas V.

The modern road was built under Mussolini, who had the old spina (median with buildings which divided the two roads of Borgo Vecchio and Borgo nuovo) ceremonially demolished in October 1936. The project was presented in propaganda as the ideal connection of the heart of Italy (Rome), with the heart of the Church, meaning Vatican. Clearing the site displaced nearly five thousand inhabitants, and the demolition erased an important medieval and renaissance quarter of the city. The architects Marcello Piacentini and Attilio Spaccarelli designed the boulevard, and since the facades of the buildings on either side of the new road did not align perfectly, traffic islands were erected along both sides, complete with rows of stone obelisks (doubling up as lampposts). Work continued after the war, and the road was inaugurated in connection with the celebration of the Jubilee Year, in 1950. The name refers to the 1929 accord that is treated in the Lateran Treaty, which also shaped the way the area is entered from the Italian capital, as the square is reached from the Ponte Sant'Angelo along the grand approach of the Via della Conciliazione.

Name, flag and national symbols

Name

The name "Vatican" predates Christianity and comes from the Latin Mons Vaticanus, meaning Vatican Mount. Its deeper etymology is unsettled. Vaticanus is more likely to derive from the name of an Etruscan settlement, possibly called Vatica or Vaticum, but if such a settlement existed, no trace of it has been discovered.

The word's later meaning shifted from place to institution. In English, the term from the 1550s denoted the mass of buildings occupied by the popes in Rome, and by extension it came to mean papal authority or political power. The state itself took its modern name only in 1929. "Vatican City" was first used in the Lateran Treaty, signed on 11 February 1929, which established the modern city-state. Its formal Italian name, Stato della Città del Vaticano, means 'State of Vatican City'.

Flag

The flag is a vertical bicolour of yellow and white, with the white half charged with the emblem of the Holy See (a papal tiara and the crossed keys of Saint Peter). Its proportions are unusual: it is one of only two national flags that use a 1:1 aspect ratio, along with the flag of Switzerland. The legal date is 7 June 1929, while the current flag was first officially hoisted on June 8, 1929.

The colours have a history of their own. On 17 September 1825, the papal flag was replaced with a yellow and white flag which took its colours from the materials of the two keys (yellow for gold, white for silver). The symbolism of the keys is explicit: the gold and the silver keys respectively represent spiritual and worldly powers. The keys are tied together by a reddish rope alluding to the bond between the two powers. A distinction also applies in practice: when what is represented is the Holy See, not Vatican City State, the keys are reversed.

Coat of arms

The arms are built on a red shield. The 2023 Fundamental Law of Vatican City State describes the shield as keys in saltire surmounted by the papal tiara on a red field. The emblem is old: this coat of arms dates from at least the early 13th century, as does the tiara that the pope traditionally has worn as a symbol of sovereignty.

The keys carry a scriptural meaning. The keys symbolize the Keys of Heaven and were presented to St. Peter by Christ. As the Popes are regarded as St. Peter's successors, the keys are one of the most important elements symbolizing the Holy See.

The fixed emblem is combined with a changing personal element. On the flag, the white field has carried a reigning pope's personal arms in some periods, such as Pope Benedict's personal arms from 2005 to 2013 and Pope Francis's personal arms from 2013 to 2023.

Anthem

The national anthem is the Pontifical Anthem and March (Inno e Marcia Pontificale). It is played to mark the presence of the Pope or one of his representatives, such as a nuncio, and on other solemn occasions. In ceremonies, when the Vatican's flag is ceremonially raised, only the first eight bars are played.

The music predates the state by sixty years. The music was composed in 1869 by Charles Gounod for the celebration of Pope Pius IX's golden jubilee of priestly ordination. Its adoption as the state anthem followed a papal decision: on October 16, 1949, Pope Pius XII declared it the papal anthem, replacing Viktorin Hallmayer's "Marcia trionfale" (1857), which had also been treated as the new state's anthem when Vatican City was founded in 1929. The words are in two languages: Antonio Allegra (Italian version, 1949) and Raffaello Lavagna (Latin version, 1991). The Vatican itself is careful about the label, stating that the piece "is not to be understood as a national anthem".

Religious identity and the relationship with Italy

The symbols express a papal identity rather than an Italian one, even though the state sits inside Rome. The 1929 flag was modeled after the 1808 flag of the Papal States, a yellow-and-white bicolour defaced with the tiara and keys in the centre. Its adoption also coincided with the creation of the state: it was adopted in 1929, the year Pope Pius XI signed the Lateran Treaty with Italy, creating the new independent state of Vatican City. Thus the Italian-facing legal act and the papal heritage of the emblems were introduced together.

The same flag travels beyond the walls. Buildings abroad that hold extraterritorial status, such as nunciatures, display it as well, which shows how the state's symbols follow its diplomatic presence rather than its territory alone.

Debates and unresolved questions

The most basic question is what kind of entity the Vatican is. It has a territory, a government and a small resident population, and it is bound to Italy by treaty, yet its purpose is ecclesiastical and most residents hold their place through an office rather than by birth. Scholars therefore disagree about whether to describe it as a sovereign state, as a religious jurisdiction that holds territory, or as a hybrid of both. The conventional criteria of statehood fit it only awkwardly. In practice, recognition by other states, and the diplomatic relations maintained with the Holy See rather than with the city itself, has done much of the work of settling its status. international-law therefore treats the case as a special one, not as a settled model.

Visitor pressure is the most visible tension between access and conservation. The Vatican Museums have described an average daily traffic of about 20,000 people, and they state that the climate-control system for the Sistine Chapel was designed to hold up to 2,000 visitors at one time. Since January 2024, tickets have been nominative, so admission is tied to a named visitor and a time window rather than being transferable. Published attendance figures do not fully agree. Statista gives attendance for 2024 as over five million, while another tourism source gives 6.8 million for 2024 and a record 6.9 million for 2025. Ticket sales are a major source of income for the state, so each measure to ease congestion also affects revenue. The museum and the cultural-heritage management bodies must weigh that revenue against wear on floors, stairs and painted surfaces, and against the goal of keeping the site open to pilgrims and scholars.

Environmental risks are of a different kind. The state is surrounded by a dense metropolitan area with heavy traffic and hot summers, and its compact stone mass retains heat well into the evening. Enclosed galleries face the combined effects of humidity, visitor numbers and airborne pollutants. Stone, mosaic and fresco surfaces respond poorly to salt crystallisation, rapid temperature changes and particulate deposits, so climate-change and local air quality present a continuing conservation problem. Conservation responses have leaned on engineering, such as climate control, and on chemistry. After a 2017 study, restorers in the gardens and on the artefacts chose low-toxicity, plant-based treatments, citing oregano and thyme among them, and that approach reflects a wider effort to balance conservation with ecological concerns.

Climate commitments have also been tested by reality. In 2007 the Holy See announced plans to become the first carbon-neutral sovereign state, emphasising solar power and a forest project to offset emissions. The photovoltaic installation on the roof of the Paul VI Audience Hall entered service in 2008. The offset forest, planned for the Bükk National Park in Hungary, did not materialise: no trees were planted under the project, and the expected carbon credits were not delivered. The episode is often cited in discussions of how far a small state's environmental pledges can be verified in practice, a question that also bears on ecosystem protection in urban-planning generally.

Governance continuity and financial transparency form the last major area of debate. Because the papacy is elective, reforms depend heavily on the priorities of each pope and on the cardinals who run the central administration. The Institute for the Works of Religion, the Vatican bank, received a supervisory body in 2010, the Financial Information Authority, created under Benedict XVI. Pope Francis later removed the investment funds from the Secretariat of State and placed them under the Administration of the Patrimony of the Apostolic See. In 2019 the bank's accounts became subject to an external audit required by law for the first time, and a 2021 conviction of its former president for money laundering and embezzlement showed the risks that earlier reforms were meant to address. Critics argue that centralised budgets and external audits are meaningful only if they survive changes in leadership and are applied to the Holy See's assets abroad as well as to those in the city. Whether such reforms are judged as lasting government practice, or as episodes tied to individual pontificates, remains an open question, and assessments of the state's bank and money management continue to differ among specialists and observers.

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