In mathematical quarters, the regular division of the plane has been considered theoretically. ...[Mathematicians] have opened the gate leading to an extensive domain, but they have not entered this domain themselves. By their very nature they are more interested in the way in which the gate is opened than in the garden lying behind it.

Maurits Cornelius Escher

Born: 17 June 1898 in Leeuwarden, Netherlands

Died: 27 March 1972 in Laren, Netherlands