• ARLIS/NA Guide to the World Wide Web

• Art Terms Glossary

• Getty Research Tools / Vocabulary Databases:
  __________Art and Architecture Thesaurus (AAT)
  __________Union List of Artist Names (ULAN)
  __________Getty Thesaurus of Geographic Names (TGN) 

• U.S. Library of Congress /  Prints & Photographs Division / Cataloging Tools:
  __________Thesaurus for Graphic Materials I: Subject Terms
  __________Thesaurus for Graphic Materials II: Genre and Physical Characteristic Terms 
  __________Graphic Materials: Rules for Describing Original Items and Historical Collections
  __________Visual Materials: Processing & Cataloging Bibliography 

• ArtQuotes.net

• Dublin Core Metadata Initiative

• ICONCLASS  (Royal Netherlands Academy of Arts and Sciences (KNAW)

• National Monuments Record Thesauri (including the Thesaurus of Monument Types and the Archaeological Objects Thesaurus,  English Heritage, UK)

• Roget's http://www.thesaurus.com/

• Green Arts Web

• Timeline of Art History (MMA)

• Vocabulary Standards and Classification Schemes  (Canadian Heritage Information Network (CHIN)