Sol Lewitt, On a Wall Which is Divided Vertically Into Three Equal Sections, One Each Red, Yellow and Blue, a 1" Pencil Grid is Drawn Over the Entire Surface, 1979. Courtesy of John Weber Gallery.

Supershow!, installation view at the Hudson River Museum, 1979. Courtesy of the Hudson River Museum and ICI.

Nancy Graves, Calipers, 1970. Courtesy of M. Knoedler Co., Inc.

Mark di Suvero, Untitled, 1976. Courtesy of Richard Bellamy.

Supershow!, installation view at the Hudson River Museum, 1979. Courtesy of the Hudson River Museum and ICI.

Edward Kienholz, The Billionaire Deluxe, 1977. Courtesy of Gemini G.E.L.