Willis Tower | |
---|---|
Height | 527m |
Floors | 108 |
Year | 1974 |
City | Chicago |
The Willis Tower (formerly and informally: Sears Tower, its title until 2009) is a 110-story, 1,450-foot (442.1 m) skyscraper in Chicago. At completion in 1973, it surpassed the World Trade Center in New York City to become the tallest building in the world, a title that it held for nearly 25 years; it was also the tallest building in the Western Hemisphere for 41 years, before the new One World Trade Center surpassed it in 2013. While it held the title of'Tallest Office Building' before 2013, it dropped the title of'Tallest Man-Made Construction' after only 3 decades. The CN Tower in Toronto, which functions as a communications tower, took over the title in 1976.
The Willis Tower is considered a seminal accomplishment for engineer Fazlur Rahman Khan. It is currently the third-tallest construction in the USA and the Western hemisphere -- and the 23rd-tallest in the world.
Cairo Tower | |
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Height | 187m |
Floors | 90 |
Year | 1956 |
City | Cairo |
The Cairo Tower (Egyptian Arabic: ??? ???????, Borg El-Q?hira) is a free-standing cement tower in Cairo, Egypt. In 187 m (614 ft), it has been the tallest structure in Egypt and North Africa for approximately 50 years. It was the tallest structure in Africa for ten years before 1971, when it was surpassed by Hillbrow Tower in South Africa. One of Cairo's famous modern monuments, sometimes considered Egypt's second most famous landmark following the Pyramids of Giza, it stands in the Gezira district on Gezira Island in the River Nile, near downtown Cairo.
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