A brilliant artist and mathematician. Serendipitously he entered my life age eleven; blessed at an early age you could say.
Truthfully, I cannot decide which medium I prefer his works in (woodcuts, lithographs, etchings, sculptures), but the medium is of no importance really. What he saw in his mind's eye and managed one way or the other to convey to us normal folk is important.


Hard to know where to begin with really.
Hmm, what about... Tessellation;

For Dummies (like me): http://mathforum.org/sum95/suzanne/whattess.html
For Boffins: https://en.wikipedia.org/wiki/Tessellation




 
 Transmogrification;






 Perspective Exploration (saved the best for last);











Should you be interested in learning more about Mr. Escher;

Official website: http://www.mcescher.com/gallery/
Wiki goodness (oh yeah): https://en.wikipedia.org/wiki/M._C._Escher