These are image databases that you have access to as a Dickinson College student. ARTstor is the largest and premier database for art and architecture images online.
Explore quality images covering the visual arts, architecture, archaeology, fashion, geography, the performing arts, science, and technology. Collections feature visual media from leading museums, photo archives, scholars, and artists, which have been rights-cleared for educational use. ***It is necessary to turn off your browser's pop-up blocker for ARTstor to work properly.*** Recommended instructions for using ARTstor on JSTOR are available. A video on how to refine image searches in JSTOR is also available. Coverage: all eras, contains primary sources. Full text.
These websites organize online images for scholarly use with many archival and art images.
Many museums are now offering high quality scans of their collections online for use by students and scholars.