Evocation of a Form: Human, Lunar, Spectral is an abstract bronze sculpture by Jean Arp. Modeled in 1950; it was cast in 1957."Evocation of a Form: Human, Lunar, Spectral, (sculpture)". SIRIS
It is in the Hirshhorn Museum and Sculpture Garden.
See also List of public art in Washington, D.C., Ward 2
References