The Art & Architecture Thesaurus (AAT) is a controlled vocabulary used for describing items of art, architecture, and material culture. The AAT contains generic terms, such as "cathedral," but no proper names, such as "Cathedral of Notre Dame." The AAT is used by, among others, museums, art libraries, archives, catalogers, and researchers in art and art history. The AAT is a thesaurus in compliance with ISO and NISO standards including ISO 2788, ISO 25964 and ANSI/NISO Z39.19. The AAT is a structured vocabulary of 55,661 concepts (as of January 2020), including 131,000 terms, descriptions, bibliographic citations, and other information relating to fine art, architecture, decorative arts, archival materials, and material culture. History The AAT project began in the late 1970s in response to the gradual automation of records by art libraries, art journal indexing services, and catalogers of museum objects and visual resources. Automation required consistency in cataloging as well as more efficient retrieval of information; a controlled vocabulary was a solution to both these problems. The project was conceived by library directors and architectural experts Toni Petersen, Dora Crouch, and Pat Molholt and was originally headquartered part-time at Rensselaer Polytechnic Institute in Troy, NY, then at Bennington College in Bennington, VT and later moved to Williamstown, Massachusetts, with the J. Paul Getty Trust providing technical advice and funding. In 1983 the Getty Trust took over editorial responsibility. The AAT offices relocated to the Getty's Los Angeles headquarters in order to better coordinate with two other similar Getty projects, the Union List of Artist Names (ULAN) and Getty Thesaurus of Geographic Names (TGN) soon after its publication. The AAT was published in 1990 and 1994 in both print and electronic form. By 1997, the size and frequency of updates made hard-copy publication unfeasible and the decision was made to publish via a searchable online Web interface and in data files available for licensing. The online Web interface is freely-accessible from any computer connected to the Internet. Final editorial control of the AAT is maintained by the Getty Vocabulary Program, part of the Getty Research Institute. Since 2008, Taiwan e-Learning and Digital Archives Program (TELDAP) collaborated with Getty Research Institute (GRI) in developing the Chinese-language Art & Architecture Thesaurus (AAT-Taiwan). The initial goal of this project is to provide multilingual search and corresponding images in integrate digital archives systems of Taiwan, and broaden the inclusion of terms related to Asian art,