From Wikipedia: > Although Escher believed he had no mathematical ability, he interacted with the mathematicians George Pólya, Roger Penrose, Harold Coxeter an

From Wikipedia: > Although Escher believed he had no mathematical ability, he interacted with the mathematicians George Pólya, Roger Penrose, Harold Coxeter and crystallographer Friedrich Haag, and conducted his own research into tessellation. I had no idea he thought that of himself. I would at least call him a mathematarchitect... I thought this was a neat video of him working on his last project: https://www.youtube.com/watch?v=AmLaM6NkTDs https://www.youtube.com/watch?v=AmLaM6NkTDs Lovely web gallery, thanks for sharing it.