Other
Rembrandt Van Rijn: Life, Paintings, Etchings, Drawings, and Self Portraits
A reference point for study of Rembrandt.
CGFA
Carol Gerten Fine Arts: M. C. Escher
This resource provides a very informative biography as well as a gallery with 15 pictures of great Escher art.
ibiblio
Ibiblio: Web Museum: Egon Schiele
This WebMuseum site offers a biography of the Austrian expressionist painter Egon Schiele, links to related artists, and pictures of some sample works.