ARTstor contains nearly 1.4 million images in the areas of art, architecture, the humanities, and social sciences. Most (but not all!) of ARTstor's images are of archival or museum materials. It is now contained within JStor.
LIMC-Icon (Lexicon Iconographicum Mythologiae Classicae) LIMC-icon is an independent online supplement to the Lexicon Iconographicum Mythologiae Classicae.
Beazley Archive at Oxford University
The Archive contains the world's largest collection of photographs of ancient Greek painted pottery, as well as relevant books and offprints, extensive material on the history of gem-collecting, and thousands of other documents and photographs relating to classical archaeology and to Sir John Beazley. Many of the Archive's images are available online, but the Archive's library remains a resource of central importance for research on classical art.