The ARTstor Digital Library is a nonprofit resource that provides over 1.5 million digital images in the arts, architecture, humanities, and sciences with an accessible suite of software tools for teaching and research. The community-built collections comprise contributions from outstanding international museums, photographers, libraries, scholars, photo archives, and artists and artists’ estates.
To use ARTstor, you must first register while on campus. Once you do that, you can use ARTstor from home for a 120-day period. Each time a user logs in to his or her account on campus, the 120-day period is reset.
The Getty Open Content Program contains over 100,000 images from the J. Paul Getty Museum and the Getty Research Institute, including more than 72,000 from the Research Institute's Foto Arte Minore archive, which features photographs of the art and architecture of Italy over 30 years by German photographer and scholar Max Hutzel (1913–1988). Other images include paintings, drawings, manuscripts, photographs, antiquities, sculpture, decorative arts, artists' sketchbooks, watercolors, rare prints from the 16th through the 18th century, and 19th-century architectural drawings of cultural landmarks. More info here.