History of Art Virtual Library http://www.hart.bbk.ac.uk/VirtualLibrary.html
Includes links to art history sites, museums, galleries, art history organizations, and university art departments.
National Gallery of Art http://www.nga.gov/
Images from the collection and news about current displays and educational opportunities.
World Art Treasures http://sgwww.epfl.ch/BERGER/index.html
In-depth links to selected artists' works and to areas of art, with good links to other sites.
Art History Resources on the Web http://witcombe.bcpw.sbc.edu/ARTHLinks.html
An extraordinarily detailed set of chronologically organized links to art history sources, from prehistoric through modern.
H-Gig Art History http://www.ucr.edu/h-gig/horuslinks.html
Easy links to some of the best art history sources and directories, based in the large HORUS system at the University of California at Riverside. Smaller and more manageable than some of the full-service sites. Click on Art History.