Mark Harden's Artchive

Great collection of high resolution images of paintings and more.

artchive.com/ftp_site.htm

Web Gallery of Art

"The Web Gallery of Art is a virtual museum and searchable database of European painting and sculpture of the Gothic, Renaissance, Baroque, Neoclassicism and Romanticism periods (1100-1850), currently containing over 20.300 reproductions. Picture commentaries, artist biographies are available. Guided tours, period music, downloadable catalogue, free postcard and other services are provided."

http://www.wga.hu/

Movie Posters

This is a great collection of American and some foriegn movie posters from the beginning of movies, many in high resolution.

impawards.com/gallery.html

Google Cultural Institute

google.com/culturalinstitute/home

Very high resolution images of paintings and other things. Zoom in to see detailed brushstrokes.