Precious precious images to be had:
- Guggenheim has released a collection of art books online
- So has the Getty
- Museo: visual search engine that connects you to the Art Institute of Chicago, the Rijksmuseum, the Minneapolis Institute of Art and the New York Public Library Digital Collection! Every image is in the public domain and completely free to use
- The Beinecke Rare Book and Manuscript collection at Yale
- The Iconographic Encyclopedia
