Dunhuang

Dunhuang is a county-level city in the far west of Gansu Province, northwest China, at the western end of the Hexi Corridor, where an oasis fed by river water meets the surrounding desert. It was established as a Han commandery in 111 BCE and became one of the main stations of the Silk Road, a meeting point for Chinese, Central Asian, Tibetan, Uyghur and other peoples. Its fame rests on the Mogao Caves, a complex of Buddhist cave temples cut into a cliff to the south-east of the town, and on the manuscript cache sealed in one of them and rediscovered in 1900.

The site matters for several reasons. Its caves preserve painted and sculpted art produced over roughly a thousand years, and its sealed library held tens of thousands of documents in many languages, dating mainly from the 4th to the 11th centuries. After these documents were dispersed to collections in London, Paris, St Petersburg, Beijing and elsewhere in the early twentieth century, they gave rise to a scholarly field known as Dunhuang studies, which draws on archaeology, linguistics, art history and the study of religion. The site also raises lasting questions about the removal of cultural material and about how heritage should be preserved and shared.

The article first sets out the town's physical setting and its early history as a frontier commandery. It then examines Dunhuang's role in trade and cultural exchange, the construction and art of the Mogao Caves, and the political changes that followed the decline of the Tang dynasty. Later sections cover the sealing and discovery of the Library Cave, the dispersal of its contents, the development of Dunhuang studies, the conservation of the site under UNESCO protection, and its place in modern cultural life.

Geography and setting

Dunhuang is a city in the far west of Gansu province in China, at the western end of the Hexi Corridor, the long strip of oasis land that connects the Chinese interior with Central Asia. The city lies just east of the Xinjiang border, and the outline places Qinghai to the south. Its urban area sits at about 1,140 metres above sea level, and the municipal government is in Shazhou Town, an older name for the place that means "town of sand."

The town is an oasis in a desert basin. Its farmland exists because water from mountain rivers is carried into the lowlands, where irrigation channels spread it across fields and groundwater supplements the supply. The contrast is sharp: green cultivated land ends abruptly where the water runs out, and the surrounding drainage basin is otherwise dry. Any change in the flow of mountain water, or in the level of underground water, therefore affects the whole settlement.

Beside the town lie two features that define the local landscape. Crescent Lake, known in Chinese as Yueyaquan, is a small crescent-shaped body of water about 5 to 6 km south of the city centre. Measured at roughly 100 by 25 metres, it has been kept alive for centuries despite the sand around it. Its depth fell steadily during the twentieth century; by the early 1990s its area had shrunk considerably, and from 2006 the local and central governments began refilling it. The lake is bordered by the Mingsha Shan, a dune range that sources describe as roughly 40 km long and 20 km wide. Accounts of its height disagree, with some giving an average of about 100 metres and others a relative height of around 250 metres. The dunes are said to produce a booming sound when wind moves the sand, which gives the mountain its name.

The dry climate and strong winds shape everyday life here. Sand is constantly moved by wind, and the dunes press against the town's edge. These same forces pose a long-term problem for the cliffs to the south-east. The climate and the wind both contribute to erosion of the rock, and sand drift has repeatedly buried or obstructed cave openings. In the late nineteenth century, for example, many caves were largely blocked by sand before they were cleared in 1900.

The Mogao Caves are cut into a cliff of relatively soft sandstone about 25 km south-east of the city centre, at the eastern foot of the Mingsha Shan. The cliff face extends for well over a kilometre and is arranged in several tiers, so the caves' interiors, paintings and wooden structures are exposed to the same local conditions of heat, dryness, moisture and sand. Their state of preservation therefore depends closely on the local climate and on how moisture moves through the rock. Later sections of this article address the history and conservation of the caves in more detail.

Naming and the Han frontier

The Chinese state's presence at Dunhuang began with the Han expansion into the Hexi Corridor. Sources agree that Emperor Wu of Han created a set of new commanderies there, and that Dunhuang was the westernmost of them. Their dates differ, however. Standard accounts tie the four commanderies, Wuwei, Zhangye, Jiuquan and Dunhuang, to a campaign in 111 BCE, when Han forces repelled a joint Xiongnu-Qiang invasion. Other accounts place their creation in 121 BCE, after a Xiongnu king surrendered, and a Dunhuang commandery is sometimes dated to shortly after 104 BC. The purpose of these outposts was defensive and logistical. They were meant to hold the land against the Xiongnu and to control traffic on the route west, which is why they were filled with settlers and garrisons. In the early period, Dunhuang governed six counties and two passes, Yumen and Yangguan, so the passes were administratively part of the same system and marked the limit of Chinese control in the west. Yangguan is also famous in later poetry as the point beyond which travellers left the empire.

The origin of the name Dunhuang has been debated for a long time, and the sources present several explanations. The most common popular explanation links the name to beacons (watchtowers) lit to warn of attacks by marauding nomadic tribes. Scholarly glosses are more varied. Some read the first character as an artificial mound, tumulus or beacon mound, while others take the pair to mean something like "honest + shining". Western and Chinese lexicographers also disagree about the characters themselves, since some scholars regard the form with the fire radical as standard, "Tun" as a variant, and the form without the radical as vulgar. A further proposal connects the name to an early Iranian word, since Ptolemy's c. 150 Geography refers to Dunhuang as Throana, possibly from Iranian Druvana. These interpretations remain unresolved.

The administrative name changed several times. In 9 CE, under the Xin dynasty, all commanderies and counties were renamed, and Wang Mang changed Dunhuang to Dunde. Later, in 563 the Northern Zhou renamed Dunhuang Mingsha County. In the Sui period, in 607 Dunhuang Commandery was re-established, and Mingsha County was abolished and its name reverted to Dunhuang County. Under the Tang, the place was first called West Shazhou in 622, and changed back to Shazhou in 633. The name Shazhou, or "prefecture of sand", remained the usual term for much of the following millennium, and in the 18th century the Qing replaced the regional names with the names of their largest cities. The name Dunhuang County was adopted in 1760.

Written evidence from the frontier survives in large quantities on wooden and bamboo slips. Excavations in 1907 recovered 705 pieces of bamboo slips among the ruins of Great Wall beacon towers in northwestern Dunhuang, and two letters found at the site of a beacon tower in Dunhuang document the difficulties of garrison life. A later excavation at the Xuanquan posthouse produced far more material, with more than 35,000 wooden and bamboo slips, and the slips span 218 years, with the earliest written in 111 BC and the latest in 107 AD. The Xuanquan records cover chronologies of the reigns of Han emperors, the activities of envoys from Central Asian states, and the activities of the Han, Xiongnu and Qiang peoples in Hexi. Together these documents give historians direct evidence for military supply, personnel and administration on the frontier.

Silk Road hub and cross-cultural exchange

Dunhuang was one of the places where the Silk Road narrowed into a set of passable routes. Caravans crossing the Tarim Basin and the Gobi reached the town through two branches, a northern and a southern one, which rejoined at the oasis. For traders arriving from the west, it was often the first trading town inside Chinese territory. The town's position at the edge of the Hexi Corridor made it a natural point for merchants, envoys, soldiers, officials and pilgrims to rest, resupply and show travel documents before going further east or west.

Routes, merchants and the economy

The commercial life of the oasis depended on long-distance exchange. Silk, which had moved westward since the Han period, was the most prominent export, and paper and other manufactured goods moved in both directions. Sogdian merchants, Iranian-speaking traders from the region around Samarkand, were especially prominent in the area from the fourth to the eighth century. They formed settlements along the routes, and their letters and business papers show a network that linked the oasis with partners far to the west. Trade reached a high point during the Sui and Tang periods, when the oasis functioned as a commercial centre as well as a stop on the route. Commerce brought the town into contact with the surrounding powers, and its prosperity rose and fell with political control of the corridor and the desert passes beyond it.

Buddhism and religious travel

Buddhist teachings reached China partly along these same land routes, and Dunhuang was one of the oasis communities where they took root. Monasteries were established near the irrigated oases of the region, and Dunhuang became one of the places where travelling monks rested and worked. Translators and religious travellers used the routes in both directions. Chinese pilgrims who went to India, and monks who returned with texts, passed through the town, and the local religious community helped copy, circulate and store scriptures. Religious patrons also sponsored the construction and decoration of cave chapels, which in turn became places where visiting and local monks could worship, study and leave their own records.

Languages and written culture

The surviving written material reflects the variety of people who passed through or lived in the town. Documents and inscriptions survive in Chinese, Tibetan, Sanskrit, Sogdian, Khotanese, Old Uyghur and Tangut, and smaller numbers of texts are in Hebrew and other languages. Chinese was the most common written language, but the mix of scripts shows that scribes, merchants and monks worked across linguistic boundaries. Some texts are translations of Indian Buddhist works into Chinese or Tibetan, while others are bilingual or record commercial and administrative exchanges between speakers of different languages. This multilingual environment is one of the clearest traces of the oasis's role as a point of contact among several cultural spheres.

Limits of the evidence

The picture of Dunhuang as a cosmopolitan hub rests largely on documents that were preserved in unusually dry conditions and then dispersed, so the proportions of languages and the scale of particular communities are estimated rather than precisely counted. Scholars also differ on how far foreign merchants settled permanently and how far they moved through the town as transients. The town's role as a meeting point is well supported, but its scale and the duration of particular foreign communities remain subjects of research.

Mogao Caves: construction and layout

Founding account and dates

Traditional accounts date the start of excavation to 366 CE. The main literary source is the Fokan Ji (An Account of Buddhist Shrines), written during the reign of Empress Wu Zetian, which describes a monk named Le Zun who saw a vision of a thousand golden-lit Buddhas at the site and then began carving a cave there. Other sources give a different year: a regional geography, the Shazhou Tujing, puts the start at 353, and the discrepancy has not been resolved. The legend explains the site's popular name, the Caves of the Thousand Buddhas, but the physical evidence for the earliest phase is less direct than the story suggests.

Growth was gradual and then accelerated. Once more monks arrived, cave cutting intensified and the community of resident monks expanded with it. Early surviving caves are generally attributed to the Northern Wei, Western Wei and Northern Zhou dynasties, with a few possibly belonging to the Northern Liang. Construction was funded by donors ranging from monastic leaders and local elites to foreign dignitaries and, in some cases, Chinese emperors, while merchants, military officers and women's groups also paid for smaller caves. Activity peaked in the Sui and Tang, when the site also gained a larger public role in worship, and the last caves were cut under the Yuan.

Scale and layout

The complex lies about 25 kilometres south-east of the modern town and is carved into a cliff roughly 1.6 kilometres long. Its cave faces are stacked in five tiers, and the cliff is reached by a network of plank-reinforced roads, walkways and staircases that link the openings, some of which sit high above the ground.

The figure of 492 caves refers mainly to the southern section, where the decorated worship halls are concentrated. The northern section contains about 243 further caves, which were primarily living quarters for monks and artisans. They include earthen kang beds, flues and lamp niches, and most of them lack painted sculptures and murals. Together the two sections account for around 735 caves that survive today, and the division between worship and living space is visible in the site's plan. Beginning in the Five Dynasties, Song, Western Xia and Yuan periods, wooden halls were built in front of many of the lower-level caves, creating a "front hall, rear cave" arrangement. Some fourteen caves retain wooden antechambers or porticoes, the oldest of which dates to the Tang.

Cave types and architectural change

The caves were built for a range of functions. Meditation caves were small niches cut beside larger chambers for individual practice. Monks' dwelling caves housed daily life and had no fixed form. Granary caves were used for storage, burial caves were used for interment, and "image caves" commemorated senior monks, often holding a statue of the monk himself. Some caves were also used to store scriptures and sacred objects.

Architectural forms changed across periods. The central pillar cave, with a square pillar rising from floor to ceiling and niches on its sides, reflects a blend of Indian chaitya-hall ideas and Chinese building practice. Many early Northern Wei and Western Wei caves used a square plan with a truncated pyramidal ceiling and a central niche. Under the Tang, multi-room and multi-storey caves appeared, and in the early Tang large Buddha caves more than 30 metres high were introduced. These held seated Maitreya statues built around a stone core and finished in clay, with circumambulation tunnels cut behind and beside them. Cave 130, known as the Great Statue South Cave, contains a seated Buddha 27 metres tall. The growth of the Tang complex in scale and ambition is what made Mogao one of the largest Buddhist art sites in China.

Art, iconography and everyday life in the murals

The wall paintings are the most extensive part of the decoration at Mogao. Roughly 45,000 square metres of murals survive across the caves, and they form one of the largest collections of Buddhist wall art in the world. Their subjects follow the main currents of the faith. Scenes from the Jataka tales, which recount the Buddha's earlier lives as a bodhisattva, appear in many caves, and one well-known example in Cave 257 shows the story of the Nine-Coloured Deer. Paradise scenes of the Pure Land are equally prominent. The Western Paradise painting in Cave 220 is among the earliest and most elaborate of these. It was dated to 642 by ink inscriptions uncovered in 1943, when the Dunhuang Academy removed later Song-period overpainting. The painting shows Medicine Buddhas, bodhisattvas, a lapis-blue pond and flying figures in an idealised landscape.

Beyond scripture, the murals preserve a wide record of secular life. Donor portraits are among the most informative images. Patrons, often members of local families, appear kneeling or standing beside the sacred figures, and their dress, hairstyles and rank are recorded in detail. Processions, scenes of building and architecture, and depictions of costume and daily activity offer evidence about the period in which each cave was painted. The relative size of figures also signals social hierarchy: during the Western Xia period, rows of donor bodhisattvas grew larger and were often placed in prominent positions in corridors or on the lower walls. Music and dance occupy a significant place in this record, with celestial musicians, dancing figures and a variety of instruments shown in performance. Scholars have used these images as sources for the history of performance in medieval China and Central Asia.

The painted sculptures and decorative motifs connect the caves to wider artistic networks. Clay figures are often painted with fine detail, and flying apsaras, celestial beings who drift across ceilings and niches, are among the most recognisable motifs. Their poses, drapery and ornament reflect Indian models, while Central Asian and Chinese conventions shaped the handling of space, colour and line. Over the centuries these influences were absorbed and reworked, so that a single cave may combine several visual traditions.

The material techniques of the murals have become a field of study in their own right. Most paintings were made in the fresco secco manner, in which mineral pigments mixed with organic binders were applied to dried plaster made from mud, straw, reeds and lime. Artists often built up colour and shading in several layers. Because many caves were repainted, sometimes by later regimes or by different workshops, conservators can read the sequence of overpaints and reconstruct earlier schemes. Analysis of pigments such as lapis lazuli and of plaster composition helps historians trace changes in materials, supply and workshop practice.

Successive regimes and the local power structure

The Tibetan empire occupied Dunhuang in 781, when the An Lushan Rebellion had drawn Tang forces away from the Hexi Corridor. The town, then called Shazhou, came under a government that placed members of local clans, including the Zhang, Yin, Suo and Yan families, in important posts. Its population was mixed: Han Chinese, Tibetans, Uyghurs, Tuyuhun and Qiang residents lived side by side, and the Tibetan period lasted roughly six decades. Tibetan rule also reshaped the language of administration and the patronage that produced the cave art, although the surviving records of that transition are uneven.

In 848 Zhang Yichao, a Han resident of Shazhou, exploited turmoil within the Tibetan state and led an uprising against the garrisons, which withdrew from the town. Within two years he had taken the neighbouring prefectures of Ganzhou, Suzhou and Yizhou, and he gradually reclaimed the eleven prefectures of the Hexi region. In 851 envoys from Shazhou reached the Tang court, and the emperor recognised the territory as the Guiyi Circuit, with Shazhou as its capital. Zhang became its military governor, and his secretary, Cao Yijin, became secretary general. The regime that grew from this arrangement is usually called the Guiyi Army, a name that conveys a "return to allegiance" with the Tang. Zhang travelled to Chang'an in 867 at the court's order and never returned. He died there around 872, and his nephew Zhang Huaishen took over the regime without formal appointment from the court. The Zhang line was later displaced, and the power of the military commissioners came to rest on a network of local officials and armed commanders.

From about 914 the Cao family took control of the regime and ruled for more than a century, passing authority through several generations of military commissioners. Their government maintained relations with neighbouring powers, including the Uyghurs and the Kingdom of Khotan, and it sponsored new caves and murals in the Mogao complex. Sources do not agree on when Cao rule ended. One account gives the end of the family's line around 1002, while another states that a Tangut army defeated Cao forces in 1036.

Dates for the Tangut takeover of Dunhuang also differ among accounts. One source places it in 1036, when the neighbouring Ganzhou Uyghur kingdom was annexed and Shazhou reportedly surrendered; a tourism-oriented history gives 1037 for the Uyghur-governed town and 1068 for the Tangut takeover, and the Tangut-led Western Xia state itself was proclaimed in 1038. The Mongols destroyed the Western Xia in 1227, and one account describes the Mongol conquest of the town as a sacking that left it heavily damaged. Under the Yuan, the area was incorporated into a unified Chinese state. Later Ming governance of the Hexi region was weaker: some popular histories describe a withdrawal of Chinese administration and population to the east of Jiayuguan in 1403, and the oasis was thinly settled for a long period afterward.

Under the Qing, Emperor Kangxi reasserted central authority over the region in the early eighteenth century. The government encouraged Han settlement by moving families and soldiers from the east, which reshaped the town's population and strengthened its Chinese-speaking character. These policies closed one chapter of a long sequence of shifting rulers, leaving a legacy of layered communities that later scholars would reconstruct from the caves and manuscripts.

Sealing and discovery of the Library Cave

The chamber and the date of its sealing

Cave 17 is a small side chamber reached through a hidden doorway in the entrance corridor of Cave 16. It is about three metres high, has a floor of roughly 2.8 square metres, and lies in the south wall of the corridor of Cave 16. Its entrance had been concealed behind a wall, so the chamber was invisible from the main cave for centuries. Its date of sealing rests largely on the dated documents inside. Judging by the written dates, the cave was closed in the early eleventh century, probably in response to a potential threat to the area.

The reasons for the sealing remain contested. One widely cited explanation links the act to a perceived military danger around 1006, a view that holds that the chamber was sealed to protect its contents from an anticipated military threat. A different line of reasoning, associated with Pelliot's 1908 analysis, places the closure before 1035, arguing from the absence of Tangut manuscripts and the presence of late Song-period material. Another interpretation holds that worn-out sacred texts were deposited there as a respectful alternative to destruction. Scholars have not found decisive documentary evidence for any single account, and many hypotheses have been advanced because no reliable materials are available.

Wang Yuanlu's discovery

The chamber was rediscovered in 1900 by Wang Yuanlu, a self-styled Daoist who acted as caretaker of the Mogao site. While carrying out amateur restoration of statues, murals and paintings in what is now Cave 16, Wang noticed a hidden door that opened into another cave, later named Cave 17. Sources give slightly different dates for the opening, with 25 June and 22 June both cited. Inside, he found a cave packed to the ceiling with ancient manuscripts, some dating back to the founding of the caves. Estimates of the total vary, but it has been estimated that there were up to 50,000 items in the cave, mostly manuscripts. The material included paintings and printed items on paper and silk, and was written in several languages, among them Chinese, Tibetan, Sanskrit and Old Uyghur.

Official response and the 1904 resealing

Wang's discovery did not lead to an orderly rescue of the collection. In the next few years, Wang took some manuscripts to show various officials, who expressed varying levels of interest, but in 1904 he re-sealed the cave following an order by the governor of Gansu, who was concerned about the cost of transporting the documents. Wang, who needed money for the repair of the caves, had also begun to give away or sell items. Since its discovery, Wang had started to give away or sell items from the repository to raise awareness and funds to repair the Mogao Caves. The modest support he sought from provincial authorities for protecting the material was not forthcoming, and the chamber's contents remained exposed to loss, dispersal and damage.

The Diamond Sutra

Among the items was a copy of the Diamond Sutra, a Mahayana Buddhist text printed in 868. Its colophon states that it was made for universal distribution by Wang Jie on behalf of his two parents. The colophon's date corresponds to May 11, 868 C.E. The scroll was produced by woodblock printing, and the text was carved onto a number of woodblocks, then printed on seven sheets of paper glued together into a scroll about sixteen feet long. Because the date is explicit, the copy is widely described as the world's earliest dated printed book, and it is now held by the British Library. The claim requires careful wording: other, earlier printed materials on paper exist, so the Diamond Sutra is regarded as the earliest complete, dated printed book rather than as the first printed object of any kind. Its importance to the history of printing and to Buddhist book culture under the Tang dynasty rests on that combination of completeness and an explicit date.

Dispersal and overseas collections

The removal of the Library Cave's contents was largely a matter of private negotiation with one custodian, the Daoist monk Wang Yuanlu, rather than a formal export process. <!-- -->Aurel Stein, a Hungarian-born archaeologist working on behalf of the British and Indian governments, reached Mogao in March 1907. Accounts agree that Wang let a selection of manuscripts leave in exchange for a donation to his temple. The sum is usually given as £130, which one account links to roughly 7,000 complete manuscripts and 6,000 fragments, though many of these were duplicate copies of the Diamond and Lotus sutras. Most of Stein's share went to London, to the British Museum, the British Library and the Victoria and Albert Museum. Material from his first three expeditions, which the Indian government sponsored, went largely to New Delhi.

French and other foreign acquisitions

French sinologist Paul Pelliot visited the cave in early 1908 and examined its contents far more systematically than Stein had. He chose a smaller group of texts that he judged most important, and he described these finds in a letter written at the site in March 1908. Pelliot's selection now sits in the Bibliothèque nationale de France in Paris. He also brought a sample of the material to Beijing in 1909, and that exhibition drew the attention of Chinese scholars to what remained in the cave.

Other expeditions also took material. Japanese expeditions, including the Ōtani group, removed manuscripts, and Russian and Danish expeditions acquired further collections. The Ōtani material was held for decades by the Lüshun Museum in Dalian, which is part of the wider scattering of the Dunhuang holdings across Japan, China and the West. Taken together, the scattered holdings now sit in institutions in London, Paris, Beijing, St Petersburg and elsewhere, as well as at smaller museums in the region.

The Chinese recovery effort

The Chinese response began with scholars. Chinese antiquarian Luo Zhenyu, who learned that more than 8,000 manuscripts still remained in the cave, argued that they had to reach Beijing quickly or they might disappear altogether. His efforts led the Ministry of Education to order their recovery. In 1910 the official Fu Baoshu transported the remaining Chinese manuscripts to the capital, but he left the Tibetan manuscripts in Dunhuang. Some items were then taken by the official Li Shengduo after they reached the ministry. Soon afterwards the 1911 revolution overthrew the Qing dynasty and diverted attention from the collection. The manuscripts were deposited in the Metropolitan Library, which later became the National Library of China, and the 8,697 items that came from Fu's convoy still form the core of that collection.

The Tibetan material was not secured in the same way. A government official sent to Dunhuang in 1919 reported finding 94 scroll bundles and 11 pothi volumes, which were removed from the cave, and their later fate is poorly documented outside China. Over the following decades, the Ministry of Culture, after 1949, transferred or purchased manuscripts that had been scattered across the country and returned them to the National Library, and some manuscripts now sit in the Dunhuang Museum, the Dunhuang Academy and the Gansu provincial library in Lanzhou.

Competing positions

Views on these transfers differ sharply. One position treats the removals as the loss of national heritage, with some Chinese commentators and public opinion regarding Stein in particular as having taken priceless material. Another position emphasises that the custodian consented, that the sums were modest, and that the texts would have been lost or damaged in the cave. Some Chinese commentary in the 1940s described the foreign acquisitions in notably restrained terms, rather than with the condemnation that became more common later.

Governments have also taken different approaches. The Chinese government has not formally requested the return of the items held abroad, although an official at the Chinese Embassy in London said in 2003 that such items should eventually return to Dunhuang. Some Chinese scholars privately argue that the dispersal has benefited research, because it has generated international interest. Disputes over ownership and the legal status of the early transfers raise questions of sovereignty and the scope of international law on cultural property, which remain unresolved. Meanwhile, cooperation through projects such as the International Dunhuang Programme has made much of the scattered material available to scholars regardless of where it is held.

Dunhuang studies and scholarship

Dunhuang studies (敦煌学, sometimes rendered as Dunhuangology) is the field that grew out of the discovery of the manuscripts in 1900. It covers the manuscripts, the grotto art, the history and geography of the oasis, the dispersal of its collections, and the history of the field itself. Accounts differ on when the term arose. One line of evidence places the coinage in the 1920s and dates its wider currency to a 1930 preface by Chen Yinke to Chen Yuan's Dunhuang Jieyu Lu. Another holds that the term gained currency in Japan and China from the 1960s. Both accounts agree that the field's scope has since widened well beyond the texts.

The first generation of scholars was Chinese, Japanese and European, and its work set the basic framework. In China, Luo Zhenyu became the most influential figure. After seeing the manuscripts in 1909, he spent more than three decades compiling and publishing them, and in 1910 he helped move most of the remaining Chinese-language manuscripts to Beijing, where they are now held by the National Library of China. His protégé Wang Guowei worked on the same material and copied Qieyun fragments by hand in London, where they had been taken by Aurel Stein. Scholars also gathered around Paul Pelliot's residence in Beijing, where they made notes, photographs and copies. Because many reprints and photocopies of Luo's editions later circulated under unclear dates, the bibliographic history of these editions has itself become a research topic.

The collection is unusually wide in language. It includes Buddhist scriptures in Chinese and many other languages, along with Tibetan administrative and literary texts, Uyghur, Sogdian, Khotanese, Sanskrit, Tocharian and other materials, which make it a major resource for multilingualism and linguistics. Chinese vernacular material such as bianwen (transformation texts), popular narratives and primers contributes to the study of literature and of early Chinese vernacular writing. Non-religious documents on mathematics, medicine, calendars and astronomy show how practical knowledge circulated on the frontier.

Research on these materials has changed several fields. Tibetan-language documents have revised the understanding of the Tibetan period in Gansu, especially administration, language use and local society. Vernacular texts have changed the account of how popular Chinese literature was written and copied in the medieval period. Comparative work with other northwestern sites, such as Turfan and Juyan, has placed Dunhuang within a wider picture of Chinese interaction with Central Asia.

Because the manuscripts were divided among institutions, scholarship has relied heavily on cataloguing and, more recently, on digital methods. Tibetan fragments that remained in Dunhuang are now held by several museums and libraries in the region, while Chinese material is concentrated in Beijing and the largest share of the rest is abroad. Digital reconstruction and shared catalogues allow researchers to match fragments that were once physically separated, and to reunite the scattered parts of single manuscripts in virtual form. This work has made the field more collaborative, though many questions about the original order and context of the collection remain open.

Conservation, the Dunhuang Academy and World Heritage status

The institution at the centre of the site's protection is the Dunhuang Academy. Its origins lie in the early 1940s: in January 1944 the National Dunhuang Art Research Institute was set up under the Nationalist government's Ministry of Education, with the painter Chang Shuhong as its first director, after advocacy by Yu Youren and others. Its first tasks were practical, including clearing accumulated sand from the grottoes, restoring murals and reinforcing cliff faces. Historians often present this as the end of roughly four centuries in which the Mogao site was left largely unmanaged and suffered repeated damage and theft. After 1949 the body was taken over and renamed in 1950 as the Dunhuang Cultural Relics Research Institute, and it adopted its current name in 1984. Its remit has since expanded from cave protection to research, copying and public display.

Legal protection developed in parallel. The State Council listed the Mogao Caves as a state priority protected site in 1961, placing them under national heritage legislation. The site was inscribed on the UNESCO World Heritage List in 1987, which opened a channel for international expertise. Since 1989 the Getty Conservation Institute has worked with the academy on structural reinforcement, mural stabilisation and digital documentation, and the site became a test case for the China Principles, a set of guidelines that take local traditions and environment into account alongside the physical fabric. In 2010, at the World Heritage Committee session in Brazil, the grottoes were praised as an example of effective conservation and sustainable tourism management. Early international assistance was modest; for instance, requests approved in 1993 totalled about 40,000 US dollars.

The threats fall into two broad groups. The first is environmental. Windblown sand, water infiltration and geological instability have affected the cliff since antiquity, and the site lies on the edge of the Gobi. Rainfall and humidity have also become a concern: during a 2019 visit, President Xi Jinping asked experts whether Dunhuang had been receiving more rain, because moisture, particularly in summer, can speed the decay of the fragile plaster and pigments. The second group is human. Visitors' breath and body heat raise carbon dioxide and humidity levels inside the caves, which can lift pigment from the clay plaster, encourage salt crystallisation (efflorescence) and promote microbial growth. Salt migrating from the underlying rock continues to damage paintings, and soot from incense and candles has become embedded in some murals. Earlier interventions also created problems: a concrete facade added to reinforce the eroded cliff in the 1960s was later judged unsuitable and has been the subject of removal recommendations.

Management responses combine access control with technical conservation. Visits are booked in advance, usually as guided tours of a selected group of caves, and photography is restricted. Reported figures for daily visitor limits differ between sources, with one citing a cap of 3,000 a day and another a cap of 6,000, so the current rule should be checked against official information. Several caves that were once open to visitors are now closed to standard tours, and their interiors are presented through digital reproductions in an on-site exhibition centre. On the technical side, the academy has developed desalination methods; one account describes a seven-year effort that used these techniques to restore Cave 85. Its methods have fed into national guidance on heritage conservation.

Digital documentation has become one of the main tools for reducing physical contact with the caves. The Digital Dunhuang project was proposed by Fan Jinshi in the late 1980s, and sources give different dates for the start of full-scale work, with some pointing to 2003 and others to the formation of a dedicated Digital Center in 2006. By the end of 2022, sources report different totals for the number of caves digitally recorded, with one giving 278 and another 289. Panoramic tours of 162 caves were delivered, and the online repository, launched in 2016, initially offered high-resolution images and panoramas for 30 caves, with an English interface added in 2017. Figures reported for 2022 include about 400 million visits from 120 countries and regions. Digital archives also let researchers examine interiors without exposing the murals to additional humidity.

Cultural legacy and modern reception

Dunhuang has become one of the most recognisable images of the Silk Road. At a 2025 expo, a Thai Ministry of Culture official described the town as a place where civilisations met, ideas circulated and different arts learned from one another (Prasop Riangngoen, permanent secretary of the Ministry of Culture of the Kingdom of Thailand, said Dunhuang is a symbol of the Silk Road). The imagery has also entered film and the stage. The 1988 Japanese production The Silk Road uses the Mogao manuscript trove as its plot centre and was chosen as Best Film at the 12th Japan Academy Prize ceremony. Since the 1970s the Chinese state has sponsored a series of Silk Road journey dance-dramas for cultural and foreign-policy purposes (staged performances of the various Silk Road journey-themed dance-dramas sponsored by the Chinese state), and the 1979 work Flower Rains Along the Silk Road has since been performed in more than forty countries and territories.

Reworking Dunhuang themes now feeds both cultural production and tourism. The stage production Ancient Sound of Dunhuang gives multiple performances a day during the busy season, and one of its dancers, from Georgia, adapted the ancient Central Asian whirling dance movements depicted on the Mogao Caves murals for the stage. Mural motifs have also become a shared visual vocabulary in Chinese design, a status that is increasingly recognized internationally. Contemporary artists continue to borrow from Buddhist iconography and from the mural techniques of the caves, often reinterpreting them in new media rather than copying them directly.

Heritage education uses Dunhuang in a different way. The site is frequently taught as a case study in how collections are cared for and who holds them. The Library Cave is a particularly useful example because the early removals remain controversial: the history that remains a source of controversy in China, and the ethical standing of the purchases is still disputed. Teaching materials commonly set the legal fact that Aurel Stein actually purchased the manuscripts against the critique that the sales were made under unequal conditions, and then ask students to weigh both.

Repatriation is the most politically charged part of this legacy. Beijing has called for their return, and some material has come back through private initiative, including eight volumes returned by a Japanese businessman in 1997. The principal positions can be stated briefly. China's government and many Chinese scholars treat the removals as a wrong that should be redressed, and they argue that the manuscripts belong to the place of their origin. Holding institutions in London, Paris and elsewhere generally argue that the material was acquired lawfully in its time, that it has been conserved, and that it has been made available to researchers. They point out that the collections have allowed scholars in London and around the world to study the rich cultural exchanges of the Silk Road. International heritage law sets these arguments against one another in terms of sovereignty, the legal status of past transactions, and the duty to protect cultural property, and it offers no settled rule that resolves them.

The site's present popularity creates a conservation problem of its own. Annual visits increased dramatically, from 780,000 in 2013 to 2.56 million in 2023. Monitoring studies have linked the humidity inside open caves to the number of people entering, and they report that relative humidity in open caves correlated closely with visitor frequency and surged during rainfall periods. Management responses include a daily entry cap, advance booking, and guided groups. Only a rotating selection of caves is open at any one time, so that each cave is exposed to fewer visitors. The balance between public access and the physical survival of the murals therefore remains an ongoing management question rather than a problem that has been solved.

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