Terry Fugate-Wilcox, 3500 A.D., date unknown, aluminum and magnesium, 25 ft. x 18 in. x 8 in. (photograph © Terry-Fugate Wilcox)

Installation of a Diffusion sculpture by Terry-Fugate Wilcox in a shopping plaza in Lemoyne, Pennsylvania, in 1983. The artist’s wife, Valerie Monroe Shakespeare, provides scale.