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.
Contemporary architecture
Adrian Smith and his own firm are the architects for the building which, in 2020, will replace the Burj-Khalifa as the tallest building in the world. The Jeddah Tower in Jeddah, Saudi Arabia, is planned to be 1,008 meters, or (3,307 ft) tall, which will make it the tallest building in the world, and the first building to be more than one kilometer in height. Construction began in 2013, and the project is scheduled to be completed in 2020.