Dia exhibited one of Warhol's major late series: the Last Supper paintings, at 548 West 22nd Street. Based on the renowned painting by Leonardo da Vinci, this image was used by Warhol at the end of his career for a remarkable group of monumental paintings. Approximately half of the dozen vast paintings, some up to forty feet in length, were made by silkscreening the image, and the other half by outlining the image as projected on the canvas. Very few of these monumental Last Supper paintings, often considered Warhol's finest late works, have been seen in United States museums. The initial exhibition for which the series was devised was held in Milan in 1987. Dia brought together five of the major monumental paintings from collections in the U.S. and abroad, plus a group of related works on paper.