Europeana, presented by the EDL Foundation, is a new digital library of over 2 million objects - image, text, sound, and video - from many of Europe's libraries, research institutions, archives, and museums, including, but not limited to, the Rijksmuseum, the British Library, and the Louvre.
Europeana is full of prime resources on some of our (my) favorite Europeans and many obscure ones as well.
For instance, a search for Shakespeare turned up 1,356 items and Picasso over 17,000, and a search for John Smith, 899.
It's in beta testing right now but is still accessible. If you're curious or bored or needing inspiration on a project, I'd suggest checking it out.