When the spire is included in the building's height, as stated by the Council on Tall Buildings and Urban Habitat (CTBUH), One World Trade Center surpasses the height of Taipei 101 ( 1671 feet ), is the world's tallest all-office building, and the sixth-tallest skyscraper in the world, behind the Burj Khalifa, Abraj Al Bait, Shanghai Tower, Ping An Finance Centre and Lotte World Tower.