M.C.Escher Mosaicos
M.C.Escher Impossible Images
Partial list of "Errors" The most immediately prominent errors are the first three or four:
M. C. Escher 1898-1972. Maurits Cornelis (M. C.) Escher was born in Leeurwarden, Netherlands in 1898. Over his lifetime, he made 448 lithographs and woodcuts.