Apollonio’s metal relief sculptures explore the expressive possibilities of structural forms and geometric patterns. Her goal is to produce a maximal optical effect by minimal means. In Relief No. 505, strips of aluminum interwoven across a painted ground form an undulating, dynamic surface that catches the light. The green paint reflects on the metal in varying intensities. Peggy Guggenheim first saw Apollonio’s work in a group exhibition at the Galleria Barozzi in 1968. Soon after, she commissioned this work directly from the artist. Following the death of Guggenheim’s daughter Pegeen Vail, the color green in this composition became a symbol for hope and regeneration.