Landmark opened in 1973 with original tenant Sears Roebuck & Co. CHICAGO, Illinois (CNN) -- Sears Tower is history. As of Thursday, the iconic Chicago, Illinois, skyscraper is now named Willis Tower.

Chicago is home to one of the tallest buildings in the world: the Willis Tower. So tall that on a windy day, the topmost floors can sway as much as three feet. But what keeps it from falling?

A large Palestinian flag was unfurled on the Brooklyn tower of the Williamsburg Bridge on Monday morning. The flag was waving from the tower's highest point, as seen in the images below from ...

View iconic buildings, such as the Merchandise Mart and Willis Tower. Hear about what the four stars on the Chicago flag represent, the legend of the O’Leary cow starting the Great Chicago Fire ...

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Owners of Willis Tower, Prudential Plaza and Aon Center received some unwelcome news from the county treasurer. But the owner of the Mart can't complain. The lease bucks the broader trend in ...

Learn about: the four stars on the Chicago flag and what they represent ... about Chicago's most famous buildings, such as the Willis Tower, and how they came to life. Along the short cruise ...

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All the Latest Game Footage and Images from The Tower of TigerQiuQiu 2: Flag Exam About： Flag question-and-answer game, please find out the correct flag pattern, in the four answers to select ...

followed by locations at Wrigley Field and Willis Tower before year’s end, a company spokesperson said. Foxtrot hired back several former employees, including the store manager, at the Gold ...

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Chicago is home to one of the tallest buildings in the world: the Willis Tower. So tall that on a windy day, the topmost floors can sway as much as three feet. But what keeps it from falling?