such as a specific location, a notable person, or a given period of time. Museums also can be based on the main source of funding: central or federal government, provinces, regions, universities; towns and communities; other subsidised; nonsubsidised and private. It may sometimes be useful to distinguish between diachronic museums - those that interpret the way in which its subject matter has developed and evolved through time (examples: Lower East Side Tenement Museum and Diachronic Museum of Larissa), and synchronic museums - those that interpret the way in which its subject matter exists at one point in time (examples: The Anne Frank House and Colonial Williamsburg). According to University of Florida's Professor Eric Kilgerman, "While a museum in which a particular narrative unfolds within its halls is diachronic, those museums that limit their space to a single experience are called synchronic." In her book Civilizing the Museum, author Elaine Heumann Gurian proposes that there are five categories of museums based on intention not content: object centered, narrative, client centered, community centered, and national. Museums can also be categorized into major groups by the type of collections they display, to include: fine arts, applied arts, craft, archaeology, anthropology and ethnology, biography, history, cultural history, science, technology, children's museums, natural history, botanical and zoological gardens. Within these categories, many museums specialize further, e.g. museums of modern art, folk art, local history, military history, aviation history, philately, agriculture, or geology. The size of a museum's collection typically determines the museum's size, whereas its collection reflects the type of museum it is. Many museums normally display a "permanent collection" of important selected objects in its area of specialization, and may periodically display "special collections" on a temporary basis. Major museum types The following is a list to give an idea of the major museum types. While comprehensive it is not a definitive list. Agricultural Architecture Archaeological Art Design Biographical Children's Community Encyclopedic Folk Historic house Historic site Living history Local Maritime Medical Memorial Natural history Open-air Science Virtual Legal framework of museums Public vs. private museums Private museums are organized by individuals and managed by a board and museum officers, but public museums are created and managed by federal, state, or local governments. A government can charter a museum through legislative action but the museum can still be private as it is not part of the government. The distinction regulates the ownership and legal