LibGuides: Finding and Using Images: Museum and Library Image Collections

Museums

The British Museum
Getty Museum Collections
More than 10,000 images from the J. Paul Getty Museum and the Getty Research Institute available through the Open Content Program. For more information: http://www.getty.edu/about/opencontent.html
The Louvre
The Louvre's Atlas database covers all the works exhibited in the museum - some 30,000 items.
MoOM: The Museum of Online Museums.
National Gallery of Art (UK)
National Gallery of Art (USA)
National Portrait Gallery (UK)
National Portrait Gallery (USA)
Smithsonian American Art Museum
Yale Digital Commons
Free online access to digital images of objects housed in Yale's museums, archives, and libraries. As of May 2011 there were over 250,000 unrestricted images.