giving the windows a close resemblance to Renaissance paintings. 20th century – modern windows Between 1954 and 1958 most of the upper windows of the nave were replaced with windows designed to harmonize with the early Gothic windows by Jean Gaudin, who had restored the windows of Amiens Cathedral. Then, in 1956, Robert Renaud, chief architect of the Center of National Monuments, commissioned a group of windows for the Chapel of the Holy Sacrament designed by the cubist-impressionist Jacques Villon, the brother of pioneer modernist Marcel Duchamp, then eighty years old. The windows are composed of intersecting lines and planes of different colors, represents the Last Supper and Crucifixion, surrounded by abstract images of earlier Biblical symbols; the rock of Mount Horeb, the Marriage at Cana, the Book of Exodus and a lamb representing Easter. They were installed in 1957. Two other abstract windows were made by Roger Bissière for the portal of La Mutte and the portal of the Tower of the Chapter. The former, facing the rising sun, has warm abstract colors, while the latter window, facing the sunset, has cool colors. The best-known windows are those designed by Marc Chagall. They were commissioned at the same time that he was chosen by André Malraux, French Minister of Culture, to decorate the central dome of the Paris Opera. The first, in Bay 17 of the west of the north transept, made between 1958 and 1961, depicts Genesis and the creation, the original sin, and the expulsion from Eden. Two additional groups were made for two bays in the north disambulatory (bays 11 and 9). They were made between 1961 and 1967, and depict Old Testament scenes, including Moses receiving the Ten Commandments, the Sacrifice of Abraham, the Burning Bush, and other events. The final series done by Chagall was created between 1968 and 1970 in the west triforium. These windows are "Grand Bouquet", a composition of birds and flowers and a rainbow on a background of nacre (Bays 111 and 113) and "Petit Bouquet" (Bays 107–109). Organs Metz Cathedral has two organs. The modern and larger organ is located in the transept. The smaller and older instrument, called the "Renaissance", is perched on the triforium of the last traverse of the nave, closest to the choir. It was placed there above the former rood screen to accompany ceremonies of the clergy taking place within the choir. It was