Dutch graphic artist M.C. Escher (1898-1972) had a passion for order and symmetry and sought to express this in several of his works. He studied regular polyhedra and their many variations: duals, compounds, stellations, and more. He sought information from his half-brother, geology professor Berend, and in books, but to really understand these tantalizing bodies, made models that could be held, rotated, and viewed from many angles.