Planned and constructed in just four years, the 1967 Universal and International Exhibition (Expo ’67), held in Montreal, Canada, was an extraordinary achievement for the quality of its urban planning, integrated transportation systems, and space frame architecture. After visiting the 1958 World’s Fair in Brussels, Canadian senator Mark Drouin, together with Montreal mayor Sarto Fournier, petitioned the federal government to apply for a world exhibition to celebrate Canada’s forthcoming centennial in 1967. The request, submitted to the Bureau International des Expositions (BIE) in Paris, fell short, however, as the 1967 exposition was awarded instead to the Soviet Union to celebrate the 50th anniversary of the revolution. When the Soviet Union bowed out on 1 April 1962 because of the exposition’s tremendous estimated cost, Canada immediately reapplied. In November 1962, the BIE granted Canada permission to stage a “first category” exhibition, which stipulated in part international part...