Various cultural institutions have contributed content to the Flickr online photo management system. Contributors include: The Library of Congress; The Smithsonian; George Eastman House; Brooklyn Museum; Getty Research Institute; New York Public Library, and dozens more. Images in Flickr Commons have "no known copyright restrictions".
The open content images from the J. Paul Getty Museum and the Getty Research Institute's collections are of works of art believed to be in the public domain and are available for free and without restriction.
OpenGLAM is an initiative run by Open Knowledge that promotes free and open access to digital cultural heritage held by Galleries, Libraries,
Archives and Museums.
Art Resource is the world's largest fine art stock photo archive, with more than 1,000,000 searchable fine art images from the world's leading sources, available for licensing to all media.
Photo agency of the French Ministry of Culture. Includes nearly 800,000 photographs of artwork housed in France’s national and regional museums, including the Louvre, the Musée d’Orsay, the Centre Pompidou, Chantilly’s Condé Museum and Palais de Beaux Arts of Lille.