The U.S. Pavilion at Expo 67 in Montreal, in which the United States Information Agency set floor decks linked by elevator and escalator within a five-eighths geodesic sphere, provided a model for the Climatroffice and successor projects from Foster + Partners, including 30 St Mary Axe. From I. Kalin, Expo ‘67: Survey of Building Materials, Systems, and Techniques Used at the Universal and International Exhibition of 1967 (Ottawa, Canada: Materials Branch, Department of Industry, Trade, and Commerce, 1967).
