
The John Hancock Center at 875 N. Michigan Ave. in Chicago, Illinois, is a 100-story, 1,127-foot (344 m) tall skyscraper designed by structural engineer Fazlur Khan of Skidmore, Owings and Merrill. When completed in 1969, it was the tallest building in the world outside New York City. It is the third-tallest skyscraper in Chicago and [...]

Sears Tower
The Sears Tower is a skyscraper in Chicago, Illinois. It has been the tallest building in the United States since 1973, surpassing the World Trade Center, which itself had surpassed the Empire State Building only a year earlier. Commissioned by Sears, Roebuck and Company, it was designed by chief architect Bruce Graham and [...]