M.C. Escher created some of the most recognizable images of this century. His visual tricks of three-dimensional perspective, ingenious tessellations of the plane, and other graphic feats have long intrigued mathematicians, scientists, and others. On the 100th anniversary of Escher’s birth, view many of his most famous creations, read short essays about his life and work, or enter a tessellation contest at the World of Escher Web site.