WikiPaintings!

Holy crap! Check out this site! It's like wikipedia, but with art!

This may not be a pipe, but it's a darn good website.

What an awesome way to spread the knowledge and beauty of art. Everything from gothic to contemporary, all in one place with great images and breif backgrounds! No excuse for not know about art anymore...get your creative brain on and learn about art!
http://www.wikipaintings.org/