The Perisphere stood 18 stories tall with a circumference of 628 feet and the Trylon reached 610 feet high. In order to test the durability of the design, models were subjected to 70-mile an hour ...

The Trylon and Perisphere were the centerpieces of the 1939 World’s Fair and this piece of promotional architecture was one of many replicas that popped up around NYC to promote the fair.

The Trylon and Perisphere were, respectively, a three-sided obelisk and a sphere mounted on five steel pillars. Connecting and encircling the two buildings was a 950-foot ramp called the Helicline.

The 1939 World's Fair's 700-foot Trylon obelisk and 18-story Perisphere were given over to the war effort after the fair. Show Caption. New York Daily News. 1 of 4.

Rosalie Fairbanks, a guide to the New York World’s Fair, points to Trylon and Perisphere in February 1939. “By far the most impressive exhibits of the Fair were the 700-foot Trylon and 200 ...

A row of statues leads to the Perisphere and Trylon at the 1939 New York World's Fair. Peter Campbell/Corbis via Getty Images. Electric Utilities Pavilion at 1939 World's Fair.

The title of this episode, “Trylon and Perisphere,” refers to a pair of iconic structures from the 1939 World’s Fair, at which the theme was “World of Tomorrow.” ...