GRAPHIC ARTS blog from Princeton
I am a huge fan of old prints and illustrations --( a passion i developed after having looked through hundreds of old art and design books as the son of an art professor)
This website is wonderful because you can enjoy the art without having to worry about owning and preserving this delicate printed material. It is quite difficult to keep these old books and prints safe from moisture, heat, etc. But nice that others go to the trouble to share it here on the web for us.