The Getty Thesaurus of Geographic Names (TGN)^®

London or Londinium? TGN contains names, variant names, and hierarchical context for current and historical cities, towns, nations, empires, physical features, and archaeological sites.

The Art & Architecture Thesaurus (AAT)^®

Catherine wheel or rose window? AAT contains terms, synonyms, definitions, and relationships for objects, styles, materials, and other topics related to art, architecture, and other material culture.

The Union List of Artist Names (ULAN)^®

Titian or Tiziano Vecellio? ULAN contains names, variant names, and biographical information for artists, architects, studios, firms, and repositories of art.

Cultural Objects Name Authority (CONA)^®

Mona Lisa or La Gioconda? CONA, a new vocabulary now accepting contributions, includes titles, attributions, and other information for art and architecture.