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The Willis Tower, originally and still commonly referred to as the Sears Tower, is a 110-story, 1,451-foot (442.3 m) skyscraper in the Loop community area of Chicago in Illinois, United States. Designed by architect Bruce Graham and engineer Fazlur Rahman Khan of Skidmore, Owings & Merrill (SOM), it opened in 1973 as the world's tallest ...
At the time, the Willis Tower held first place in the second and third categories, the Petronas Towers held the first category, and the original WTC North Tower held the fourth (height to tip) category with its antenna. [19] In 2000, however, a new antenna mast was placed on the Willis Tower, giving it the record in the fourth category.
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July 2009 - The Sears Tower is officially renamed Willis Tower. The same month, an attraction called the Ledge opens on the 103rd floor, with glass balconies and a view down 1,353 feet to the ...
The tallest building in the city is the 110-story Willis Tower (also known as the Sears Tower), which rises 1,451 feet (442 m) in the Chicago Loop and was completed in 1974. [ 2 ] [ 3 ] Sears Tower was the tallest building in the world upon its completion, and remained the tallest building in the United States until May 10, 2013. [ 4 ]
The observatory (360 Chicago), [11] which competes with the Willis Tower's Skydeck, has a 360° view of the city, up to four states, and a distance of over 80 miles (130 km). 360 Chicago is home to TILT, a moving platform that leans visitors over the edge of the skyscraper to a 30-degree angle, [12] a full bar with local selections, [13 ...
[10] [11] Calder unveiled the model for Flamingo on April 23, 1973, at the Art Institute of Chicago; the sculpture was presented to the public for the first time on October 25, 1974, at the same time that Calder's Universe mobile was unveiled at the Sears Tower (now the Willis Tower). The day was proclaimed "Alexander Calder Day" and featured a ...
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