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The dome was originally going to be disassembled after the fair, but it was cheaper for constructors to bolt the contraption together, and thus the building was left intact with the ground. The author of this article praises the beauty and size of the building, and I strongly agree with their outlook.
Michelle. "Biosphere of Montreal." Atlas Obscura. N.p., n.d. Web. 18 Sept. 2014. <http://www.atlasobscura.com/places/biosphere-of-montreal>.