Paris Musées, a collection of 14 museums in Paris have recently made high-res digital copies of 100,000 artworks freely available to the public on their collections website. Artists with works in the archive include Rembrandt, Monet, Picasso, Cézanne, and thousands of others.
Read Home School: Paris Museums Put 100,000 Images Online for Unrestricted Public Use via Kottke
An interesting link found among my daily reading