Naum Gabo was a Russian and American constructivist sculptor and theorist. He was a key figure in the Russian avant-garde and the subsequent development of 20th-century sculpture. Gabo was photographed for Karsh’s “American Artists Series,” which also included sculptor Jacques Lipchitz and painter Josef Albers. See the complete list of sitters.

Gabo was born on this day, July 24, in 1890 (d. 1977).