Tallest Building

On December 31, 2004 Taipei 101 opened as the tallest building in the world, just barely edging out Chicago’s Sears Tower, now called the Willis Tower.

Since then it has been soundly beaten by the Burj Khalifa in Dubai. The Sears Tower and Taipei 101 were both less than 500 meters in height, while Burj Khalifa is over 800 meters in height, with 163 floors. The former World Trade Center had 110 floors.