During Expo 67 (1967 Worlds Fair) the dome was the US Pavillion. Located on the western tip of Île Sainte-Hélène, alongside the USSR pavilion but separated by the Le Moyne canal. It initially sparked controversy as some people felt it was too daring, architect Richard Buckminster Fuller's geodesic dome quickly became one of the most prominent symbols of Expo 67. Given to the City of Montreal by President Lyndon B. Johnson. It now operates as an environmental sciences museum called Biosphère.