Split Button, 1981
Aluminum painted with polyurethane enamel
16 ft. (4.9 m) diameter x 10 in. (0.3 m) thick
height from ground when sited: 4 ft. 11 in. (1.5 m)
Levy Park, University of Pennsylvania, Philadelphia
Photo by Attilio Maranzano

Fabricated by Lippincott, Inc., North Haven, Connecticut. Engineer: J. Robert Jennings
Commissioned December 1978 by the University of Pennsylvania, with a matching grant from the National Endowment for the Arts
Installed June 25, 1981
Inaugurated November 6, 1981