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This article is about the CN Tower in Toronto, Ontario. For the tower in Edmonton, Alberta, see CN Tower (Edmonton). Page semi-protected CN Tower Tour CN Toronto - ON - Toronto Harbourfront7.jpg CN Tower is the world's 6th tallest free-standing structure.[1] CN Tower is located in Toronto CN Tower Location within Toronto Alternative names Canadian National Tower, Canada's National Tower Record height Tallest in the world from 1976 to 2007[2][I] Preceded by Ostankino Tower Surpassed by Burj Khalifa General information Status Complete Type Mixed use: Observation, telecommunications, attraction, restaurant Location Toronto, Ontario, Canada Coordinates 43°38′33.36″N 79°23′13.56″WCoordinates: 43°38′33.36″N 79°23′13.56″W Construction started 1973[3][4] Completed 1976 Opening October 1, 1976 Cost CDN $ 63,000,000[4] Owner Canada Lands Company Height Antenna spire 553.33 m (1,815.4 ft) Roof 457.2 m (1,500.0 ft) Top floor 446.5 m (1,464.9 ft) Technical details Floor count 147 Lifts/elevators 9[5] Design and construction Architect WZMH Architects: John Andrews, Webb Zerafa, Menkes Housden[5] Website www.cntower.ca References [3][4][5] The CN Tower (French: Tour CN) is a 553.33 m-high (1,815.4 ft) concrete communications and observation tower in Downtown Toronto, Ontario, Canada.[3][6] Built on the former Railway Lands, it was completed in 1976, becoming the world's tallest free-standing structure and world's tallest tower at the time. It held both records for 34 years until the completion of Burj Khalifa and Canton Tower in 2010. It remains the tallest free-standing structure in the Western Hemisphere, a signature icon of Toronto's skyline, and a symbol of Canada,[7][8] attracting more than two million international visitors annually.[5][9] Its name "CN" originally referred to Canadian National, the railway company that built the tower. Following the railway's decision to divest non-core freight railway assets, prior to the company's privatization in 1995, it transferred the tower to the Canada Lands Company, a federal Crown corporation responsible for real estate development. Since the name CN Tower became common in daily usage, the abbreviation was eventually expanded to Canadian National Tower or Canada's National Tower. However, neither of these names is commonly used.more info http://en.wikipedia.org/wiki/CN_Tower cn tower facts cn tower glass floor cn tower edge walk cn tower height cn tower restaurant cn tower tickets cn tower climb cn tower hours CN Tower - Canadian National Tower - Canadian National Tower, Canada's National Tower Wonders of the World American Society of Civil Engineers