Fine Arts Museums of San Francisco Imagebase
- Collection reproductions of Escher's art.
- http://search.famsf.org:8080/search.shtml?keywords=Escher

Escher Art Collection
- A collection of images of artist's works.
- http://home.comcast.net/~eschermc/

Artcyclopedia: M.C. Escher
- Guide to art museum sites and image archives where artworks of M.C. Escher can be viewed online.
- http://artcyclopedia.com/artists/escher_mc.html

Leiden University - Escher and the Droste Effect
- Student project aiming to visualize the mathematical structure behind the 'Print Gallery'.
- http://escherdroste.math.leidenuniv.nl/

Maurits Cornelius Escher: A biography
- A biography of M.V. Escher.
- http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Escher.html

The world of Escher
- An online collection of the works of Escher, along with an online store.
- http://www.worldofescher.com/

Zvi Har'El's M.C.Escher Collection
- Image gallery with 84 drawings.
- http://www.math.technion.ac.il/~rl/M.C.Escher/

Mathematical Art of M.C. Escher
- A detailed and liberally illustrated essay on the signifigance of Escher's artwork for the student of mathematics.
- http://www.mathacademy.com/pr/minitext/escher/index.asp

M.C. Escher
- Art, news, history, copyright and M.C. Escher Foundation information.
- http://www.mcescher.com