b. July 22 1898, Pennsylvania, USA - d. November 11 1976, New York, USA

Alexander "Sandy" Calder was an internationally admired American sculptor and artist who is best known for making sculpture move. In the 1930's, he combined engineering and art to invent the mobile, a kinetic abstract sculpture of metal pieces connected by wires or rods that are delicately balanced to float in space and move in response to surrounding air currents or the push of a finger.

In addition to mobiles and stabiles (free-standing, static abstract sculptures) Alexander Calder also created paintings, lithographs, toys, tapestry and jewelry.