Bottom line: The AON Center got just one year as the tallest building in Chicago before it was surpassed by the Sears Tower, which is now known as Willis Tower. Originally known as the Standard ...

As we look back on the tower’s 15-year legacy, the visionary behind its groundbreaking design delves into how the structure ...

Downtown Des Moines apartment building would join list that includes Mutual of Omaha HQ and high rises in Detroit, Ohio, ...

Occupying the 103rd floor – that's nine floors higher than 360 CHICAGO – of the 110-story Willis Tower (the third-tallest building in North America after One World Trade Center and Central ...

So, what is the tallest building in the U.S. and what are its closest competitors? Each towering skyscraper tells a story. From New York's One World Trade Center to Chicago's Willis Tower ...