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Before considering a geodesic sphere, different design structures were considered for Spaceship Earth including the Roman Parthenon, the dome of Saint Peter’s Cathedral in the Vatican (150 feet high and 107 feet in diameter), and the 125-foot-diameter steel frame supporting a map of the world, like the one at the 1964–65 New York World’s Fair. A golden geodesic dome was also seriously considered, inspired by the Expo ’67 dome in Montreal.
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Jim Korkis (Secret Stories of Walt Disney World: Things You Never Knew You Never Knew)