The Getty vocabularies contain structured terminology for art, architecture, decorative arts and other material culture, archival materials, visual surrogates, and bibliographic materials. Accessible free of charge for limited online use.
The Art & Architecture Thesaurus (AAT)®
The Cultural Objects Name Authority (CONA) ™
The Getty Thesaurus of Geographic Names (TGN)®
The Union List of Artist Names (ULAN)®