The Art & Architecture Thesaurus (AAT) is a structured vocabulary of around 125,000 terms, scope notes, and other information for describing fine art, architecture, decorative arts, archival materials, and material culture.
The Getty Thesaurus of Geographic Names (TGN) is a structured vocabulary of around 1,000,000 geographic names, including vernacular and historical names, coordinates, and place types, and focusing on places important for the study of art and architecture.
The Union List of Artist Names (ULAN) is a structured vocabulary containing around 220,000 names and biographical information about artists and architects, including a wealth of variant names, pseudonyms, and language variants.


