Installation view of The Cardinal Numbers (1966) in Robert Indiana, Dayton's Gallery, Minneapolis, September 27–October 22, 1966. Photo courtesy of the Joan Kron papers, 1959–1971, Archives of American Art, Smithsonian Institution
Robert Indiana at Dayton's Gallery 12, the artist's largest solo exhibition to date, featured The Cardinal Numbers (1966), several recent LOVE paintings, and USA 666 (The Sixth American Dream) (1964–66), among other works.