This is a unique world wide effort, begun by the Brooklyn Museum, to illustrate Wikipedia entries on works of art with images from participating museums.
From their FaceBook Group:
"Wikipedia Loves Art is a scavenger hunt and free content photography contest coordinated by the Brooklyn Museum, with the Art Gallery of New South Wales, the Carnegie Museum of Art, the Film Society of Lincoln Center, the Indianapolis Museum of Art, the Los Angeles County Museum of Art, the Metropolitan Museum of Art, the Victoria and Albert Museum, and possibly other museums and cultural institutions worldwide, and aimed at illustrating Wikipedia articles. It is scheduled to run for the whole month of February 2009."
There is an extensive list of prizes and photographers will be credited for their work. The complete rules can be found at the Wikipedia entry: Wikipedia Loves Art Info
Wikipedia Loves Art Flickr Group