List of tallest buildings
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at . The CTBUH only recognizes buildings that are complete however, and some buildings included within the lists in this article are not considered finished by the CTBUH.
History of the world's tallest buildings
In 2004, the construction of Taipei 101 brought the height of skyscrapers to a new level, standing at with 101 floors. It is taller than the previous record holders, the Petronas Towers. Burj Khalifa surpassed the height of Taipei 101 by in 2009, making it 60% taller. It has broken several skyscraper records, and it is almost twice as tall as the Empire State Building. Burj Khalifa has also broken the record of the world's tallest structure.Since the early skyscraper boom that took place in North America, the significant number of skyscrapers in North America have dominated the 100 tallest buildings in the world. In 1930, 99 of the 100 tallest buildings in the world were located in North America. In the future, this percentage is expected to decline to only 22 percent. The predominance of skyscrapers in North America is decreasing due to skyscraper construction in other parts of the world, especially in Asia.