About 253,000 people enter Willis Tower, formerly known as Sears Tower, each month.
Willis Tower was created in 1973.
Willis Group Holdings, a London-based insurance broker, consolidated its Chicago area offices to the Sears Tower. As part of the deal, Willis Group Holdings gets to put its own name on the skyscraper.
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108 Stories, and the Sears Tower is now known as The Willis Tower.
The Willis Tower is 225 feet wide.
Of course, the Willis tower is in real life.
There are 2,109 steps to the Skydeck in the Sears Tower (now known as the Willis Tower).
110 stories high