JSTOR: JSTOR is a digital library that includes multiple types and formats of searchable content including images. Licensed Artstor collections have been added to JSTOR.
Oxford Art Online: The database includes extensive image links. Search by era and region.
Perseus Art and Artifact Browser: Perseus Art and Archaeology Artifact database is a tool for finding images, general information, and bibliography about buildings, coins, gems, sculptures, sites, and vases in Greek and Roman antiquity.