ArtSTOR Digital Library
ARTstor Digital Library provides more than one million digital images in the arts, architecture, humanities, and sciences with accessible suite of software tools for teaching and research. The collections comprise contributions from outstanding international museums, photographers, libraries, scholars, photo archives, and artists and artists' estates. NOTE: You will need to register with ArtSTOR if you wish to download images or create image groups.
Piazza San Marco and Basilica of St. Mark. Artstor.