The CN Tower
When was The CN Tower built?
The CN Tower construction started in 1972, and finished in 1976.
What's the purpose of this structure?
Canada went through a era where they were increasing tremendously on building structures, most of them were skyscrapers, large office buildings, etc. But, soon they reached a problem where their skyscrapers were blocking the television and radio frequency signals, so to resolve their problem by building a communications tower tall enough so that any radio or TV communications from it would not be obstructed by other high-rise buildings in the city. The tower also served as a hub (central point) for microwave transmissions, allowing two businesses that were not visible to each other to exchange data by having the tower transmit it.
How is the structure innovative?
What makes The CN Tower so innovative, is that it is one of the tallest free-standing structures, and still remains the tallest free-standing structure in the Western Hemisphere. Another way its innovative, is that it has a large glass floor which gives you many panoramic views, and it offers shopping and dining.