In this photo of Sept. 8, 1966, the painter Marc Chagall poses by his mural “Le Triumphe de la Musique,” The Triumph of Music, during the unveiling ceremonies in the lobby of the Metropolitan Opera House at Lincoln Center, in New York. Through the transparent windowpanes of the building, The Sources of Music in yellow (right) and The Triumph of Music in red (left) dominate the frontal view of the opera house. Although specifically created for the opera house, there were various autobiographical elements by Chagall in those paintings. Only at night, the murals are on view. During the day they are covered with white sheets in order to protect them from the sun.