A museum is a permanent institution that collects, preserves, researches, interprets, and exhibits cultural or natural heritage. Its activities connect the care of objects and collections with public access, education, and knowledge sharing. A definition adopted by the International Council of Museums (ICOM) on August 24, 2022, describes museums as not-for-profit institutions serving society and emphasizes accessibility, community participation, and the protection of tangible and intangible heritage. Museums therefore encompass more than exhibition buildings: their responsibilities include collections, research, interpretation, and long-term stewardship. (icom.museum)
Historical development
One important route toward the modern public museum developed from private collections of natural specimens, antiquities, and manufactured objects. The collection assembled by John Tradescant and his son in seventeenth-century England brought together botanical, geological, zoological, and human-made material. Subsequently acquired by Elias Ashmole and transferred to the University of Oxford, it formed the foundation of the Ashmolean Museum, which opened to the public in 1683. Its original building also accommodated a chemistry laboratory and teaching rooms, linking collecting with practical investigation and instruction. (ashmolean.org)
The British Museum was established by an Act of Parliament in 1753 and opened in 1759. It represented a national institution organized around public collections, although early visitors needed tickets and access was restricted in practice. In France, royal paintings became the starting point for the Louvre museum, which opened in 1793 and subsequently received works through revolutionary confiscations and military conquest. These histories illustrate how public museums emerged through different combinations of scholarly collecting, state ownership, and political transformation. (britishmuseum.org)
Types and scope
Museums vary by subject, audience, institutional setting, and the character of their collections. Major categories include art, history, natural history, and science museums, alongside children’s museums and historic houses or sites. The broader museum field also includes science centers, botanical gardens, zoos, and aquariums. These categories overlap: a single institution may combine several subjects, while a historic site may interpret buildings and landscapes rather than concentrate on movable objects. The American Alliance of Museums applies professional standards across this broad spectrum rather than treating one organizational model as universal. (aam-us.org)
Differences in scope affect what institutions preserve and how they provide access. At the Smithsonian Institution, for example, collection storage includes natural history specimens, anthropological objects, meteorites, films, images, and biological repositories. Some materials require specialized preparation or storage environments. The museum collection is consequently not identical to the material visible in galleries; it also includes resources maintained for study and future use. (si.edu)
Collections and conservation
Collection development involves deciding which objects fit an institution’s mission, establishing ownership, and recording information needed for their care and interpretation. Provenance research investigates an object’s origins and history, including previous ownership and transfers. ICOM’s professional guidance identifies acquisition procedures, legal compliance, provenance, and due diligence as central responsibilities, particularly in preventing illicit trafficking in cultural property. (icom.museum)
Conservation protects collections against deterioration and damage. Preventive conservation reduces risks before treatment becomes necessary, addressing factors such as light, pests, pollutants, unsuitable temperature or relative humidity, physical forces, water, fire, theft, and loss of identifying information. Environmental management must take account of the materials involved rather than assume that every collection has identical needs. Handling, transport, and exhibition conditions are also part of preservation planning. (mci.si.edu)
Collections require administrative as well as physical care. Documentation supports identification, location control, research, and accountability. Deaccessioning, the formal removal of an item from a collection, is distinguished from routine movement or lending. ICOM’s published ethical guidance treats disposal as a consequential decision requiring attention to legal authority, institutional responsibilities, and the public interest. (icom.museum)
Research, interpretation, and education
Research and interpretation connect collections with the information presented to visitors. UNESCO’s 2015 recommendation identifies preservation, research, communication, and education as principal museum functions. Research helps establish the significance of collections, while exhibitions and other forms of communication make that knowledge accessible. Museums support formal schooling, informal learning, and lifelong learning, and can provide settings for intercultural dialogue and discussion. Their educational role extends beyond transmitting facts to helping audiences understand why heritage is preserved and how knowledge about it is produced. (unesco.org)
Digital access provides another means of using collections. Online records can combine descriptive information with photographs, audio, video, and three-dimensional representations. Smithsonian Open Access, for example, makes designated digital assets available under Creative Commons Zero, allowing their reuse without further permission from the institution. Such access connects museum resources with teaching, research, and creative work outside the physical gallery. (collections.si.edu)
Governance, ethics, and public access
Museum governance concerns responsibility for institutional resources, personnel, collections, security, and professional conduct. Ethical standards supplement applicable law by addressing obligations that extend beyond ownership alone. ICOM’s guidance covers returns and restitution as well as acquisition, emphasizing that collection management involves responsibilities toward society and other communities. The organization’s 2022 definition also places community participation and inclusive access within the museum’s institutional purpose. (icom.museum)
Accessibility includes removing barriers to participation, including those affecting people with disabilities. UNESCO’s recommendation calls for museums to support social inclusion, cultural diversity, and sustainable development. It also recognizes their contribution to creative industries and tourism while maintaining preservation and public service as essential responsibilities. (unesco.org)