Home Escher: the alchemist of impossible architectures Escher. Concave and convex. Lithography, 1950

Escher. Concave and convex. Lithography, 1950

Escher. Concave and convex. Lithography, 1950

Escher. Bond of union, 1956. Lithography
Escher. Encounter. Lithography, 1944