In-Class Quiz: The Willis Tower Timeline

 The Willis Tower, previously known as the Sears Tower, is one of Chicago's biggest attractions. It was known as one of the tallest buildings for the longest, being 110 stories high. Taking about 3 years to build, The Willis Tower is not only one of the tallest buildings in the world, this building is also an icon for Chicago and a big part of the city's skyline. For being an office building, the Willis Tower receives nearly 1.7 million tourists every year, visiting the buildings Skydeck and The Ledge. In the timeline below we will see the history of this breathtaking building.