The core of this detailed art site is a collection of more than 2,200 images of the works of over 200 different artists. 
 

Artcyclopedia :  http://www.artcyclopedia.com

This site serves as a comprehensive index to the online exhibits of thousands of artists.  Search by artist's name, artwork title, or museum name. Also browse the database by movement, medium, subject, or nationality.  Entries include links to museum sites, image archives, and other online resources. 
 

Artists Index :  http://sunsite.unc.edu/cjackson/fineart.htm

An image database listing artists alphabetically, by nationality, or by dates. 
 

ArtSource :  http://www.ilpi.com/artsource/

Created by a former art librarian, this site contains annotated links to art and architecture sites.  Categories include electronic exhibitions, image collections, online art journals, art schools and programs, libraries, museums, and organizations. 
 

AskART.com :  http://www.askart.com

Offers "extensive information on 24,000 North American artists."  Includes such information as biography, image gallery, auction records, museums, and exhibitions. 
 

Great Buildings :  http://www.greatbuildings.com

This site is an excellent international and historical directory for built architecture.  Over 750 buildings and their architects are available, complete with brief biographical information, descriptions of the buildings, and a short resource list.  Each building has construction date, location, building type, and other fields. Searchable by name of building, architect, or place.  Entries with photographs are shown in bold type. 
 

Musee :  http://www.musee-online.org

Musee offers a directory of links to museums in the United States and around the world.  The directory can be browsed by type of museum, name, or location. 
 

Perseus Digital Library :  http://www.perseus.tufts.edu/

The Perseus Digital Library is a continually growing collection of resources for studying the ancient world, having more than 13,000 images of vase paintings, coins, architecture, and site plans, as well as full-text of many Greek and Latin classics. 
 

Union List of Artist Names (ULAN) :  http://www.getty.edu/research/tools/vocabulary/ulan/index.html

The ULAN Browser is a database of names and associated information (such as dates, variant names, pseudonyms, and language variants) about artists. "Artists" can include individuals or groups of individuals working together and range from painters to ceramicists, and architects to draftsmen.  Part of the Getty Vocabulary Program.