Willis Tower
Chicago, IL
City
The Willis Tower, formerly known and still commonly referred to as the Sears Tower, is a 110-story, 1,451-foot skyscraper in the Loop of Chicago, Illinois, United States. Designed by architect Bruce Graham and engineer Fazlur Rahman Khan of Skidmore, Owings & Merrill, it opened in 1973 as the world's tallest building, a title that it held for nearly 25 years.
From Wikipedia, CC BY-SA 4.0
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