Big Crinkly, 1969
Alexander Calder (1898–1976)
Alexander Calder is best known for his hanging, mobile sculptures. His interest in movement was manifested in his early figurative wire sculptures, which have a playful, mechanical sensibility akin to wind-up toys.
Some of his subsequent abstract sculptures are operated with cranks and pulleys, but his real breakthrough came with his invention of hanging sculpture, which he called “mobiles.” Calder's mobiles consist of abstract shapes connected by wires, and they move freely with the air currents in a room.