Carl Andre, Reef, 1966. International orange Styrofoam. Overall dimensions vary with installation; originally installed in 50-unit row: 50,8 x 1270 x 274,3 cm overall; 25-80 units, 25,4 x 50,8 x 274,3 cm each unit. Solomon R. Guggenheim Museum, New York, Panza Collection, 1991. Installation Un choix d'art Minimal dans la collection Panza, Musée d'Art Moderne de la Ville de Paris, Parigi, July 12 - November 4, 1990. © 2018, ProLitteris, Zurich. Photo © Giorgio Colombo, Milano