[Construction of the Perisphere with shadow of Trylon visible, New York World's Fair site.]
[Construction of the Perisphere, New York World's Fair site.]
[Construction of the Trylon and Perisphere, New York World's Fair site.]
[Construction of the New York World's Fair site.]
[Construction of the Perisphere and Trylon, New York World's Fair site.]
[Construction of the New York World's Fair site, with the steel frames of the Trylon and Perisphere visible in the background.]
[Construction of the Helicline, Trylon and Perisphere, New York World's Fair site.]
[Construction of the Trylon and Perisphere at the New York World's Fair site.]
[Construction at the New York World's Fair site, showing Trylon and Perisphere.]
[Construction at the New York World's Fair site, showing Perisphere, Helicline and Trylon.]