This 6-cent United Nations stamp, issued in 1973, reproduces part of Marc Chagall’s famous stained-glass window created for the UN headquarters in New York. The window, gifted in 1964, is a vibrant tribute to peace and humanity, filled with Chagall’s signature dreamlike figures and celestial imagery. The design features shades of deep blue with touches of red, yellow, and white, evoking both hope and spirituality. Issued for regular postal use, it is a highly collectible issue celebrating the intersection of art and international diplomacy. A fine example of 20th-century philately where art and politics unite.