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.
Gran Torre Santiago
|City||Santiago de Chile|
The Costanera Center Torre 2, better known as Gran Torre Santiago (Great Santiago Tower), and Formerly known as Torre Gran Costanera, is a 62-story tall skyscraper in Santiago, Chile, the second tallest in Latin America.It is the fourth-tallest building in the Southern hemisphere by highest architectural feature (supporting New Zealand's Sky Tower, Australia's Q1 Tower and Australia 108) and third-tallest by highest occupied floor (after Australia's Australia 108 and Eureka Tower). It was designed by Argentine architect César Pelli, Chilean architects Alemparte Barreda & Asociados, and from the Canadian firm Watt International. Source: Wikipedia
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