 A U.S. postage stamp commemorates the Fifth International Philatelic Exhibition as well as the Coliseum.The Triborough Bridge and Tunnel Authority's chairman, Robert Moses, first envisioned a convention center for New York City in 1944.Separately, in 1946, the Madison Square Garden Corporation proposed building a large sports arena along the western edge of Columbus Circle between 58th and 60th Streets, supplementing the existing Madison Square Garden (MSG) ten blocks south.