The Official M.C. Escher Website by Cordon Art B.V., worldwide and exclusive representative of the works and writings of the artist. This site presents 12 sections on the life and work of M.C. Escher and detailed information on copyright issues.

National Gallery of Art, Washington, D.C., presents here a detailed biography of M.C. Escher and an interesting selection of 24 works, together with commentary from one of the largest M.C. Escher collections in the world.

This is comprehensive site by an author of numerous teaching aids on tessellations, Jill Britton, which offers an impressive number of links to recreation-oriented learning experiences for students of mathematics and geometry.