M.C. Escher

Maurits Cornelis Escher (17 June 1898 – 27 March 1972), usually referred to as M. C. Escher was a Dutch graphic artist.

He is known for his often mathematically inspired woodcuts, lithographs, and mezzotints.
These feature impossible constructions, explorations of infinity, architecture, and tessellations. 

A 1929 self-portrait

He worked primarily in the media of lithographs and woodcuts, though the few mezzotints he made are considered to be masterpieces of the technique. In his graphic art, he portrayed mathematical relationships among shapes, figures and space. Additionally, he explored interlocking figures using black and white to enhance different dimensions. Integrated into his prints were mirror images of cones, spheres, cubes, rings and spirals.

Hand with reflective sphere