Gravity, lithograph, hand-coloured, 1952.

“Here is another star dodecahedron, bordered by twelve flat five-pointed stars. On each of these platforms lives a tailless monster with a long neck and four legs. Its torso is trapped under a five-sided pyramid with walls, each with an opening, through which the animal protrudes its head and legs. But the pointed end of a platform on which one animal lives is also the wall of the dungeon of one of its fellow sufferers. All these triangular ends therefore have the double function of a floor as a wall.” ~ M.C. Escher, Grafiek en Tekeningen.