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Beginning to build
Digging and construction of the foundation started in February 6, 1973 -
Construction on the sphere
With the most important part of the building in place, construction on the sphere, which would hold the restaurant and observation decks, commenced in August 1974 -
Built-ed
CN Tower was built in 1976 -
Finally complete
On April 2, 1975, the CN Tower was finally complete -
Opening
Opening its doors to the public on June 26, 1975
