Maurits Cornelis Escher (June 17 1898 - March 27 1972), usually referred to as M. C. Escher, was a Dutch graphic artist known for his often mathematically inspired woodcuts, lithographs and mezzotints which feature impossible constructions, explorations of infinity, architecture, and tessellations. Wikipedia
It concerned the estate of MC Escher, some of whose works were reproduced and marketed in the US without licence or other authority from the artist's copyright heirs. www.artquest.org.uk/artlaw/copyright/28920.htm
The definitive Wikipedia entry for M. C. Escher. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/M._C._Escher
Walker Fine Art focuses on 20th Century and contemporary art and features one of the largest collections of original artwork by M.C. Escher, drawings and prints by Roberto Matta, sculpture by Ernest Trova, and more. www.everythingescher.com/
The definitive Wikipedia entry for M. C. Escher. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/M%2e_C%2e_Escher