CAMIO: Catalog of Art Museum Images Online
OCLC's Catalog of Art Museum Images Online — is a growing online collection documenting works of art from around the world, representing the collections of prominent museums.
Oxford Art Online
CARLI Digital Collections
CARLI Digital Collections was established in 2006 as a repository for digital content created by member libraries of the Consortium of Academic and Research Libraries in Illinois (CARLI) or purchased by the consortium for use by its members.