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This is a list of buildings and other structures that have been envisioned. The X-Seed 4000 is one of the tallest structures ever conceived. Shown in this image is the Burj Khalifa (828 m (2,717 ft)), tallest structure in the world at the time of completion in 2010 to this year (2025), and the X-Seed 4000 project (4,000 m (13,000 ft)).
Diagram of the principal high buildings of the Old World, 1884. Notable mentions include the Pharos (lighthouse) of Alexandria, built in the third century BC and estimated between 115–135 m (377–443 ft). It was the world's tallest non-pyramidal structure for many centuries.
This list of tallest buildings by height to roof ranks completed skyscrapers by height to roof which reach a height of 300 metres (984 ft) or more. Only buildings with continuously occupiable floors are included, thus non-building structures, including towers, are not included. Some assessments of the tallest building use 'height to roof' to ...
This recently completed skyscraper (pictured center-left in this image), also known as the Steinway Tower, is the most slender skyscraper in the world, with a height-to-width ratio of 24:1, its ...
Here are 10 of the tallest skyscrapers around the world that now sit empty or uncompleted — and how they ended up that way. Beirut Trade Center, Beirut (459 feet) The Burj al-Murr or Beirut ...
Shanghai Tower skyscraper 5. KRDK-TV mast. The tallest structure in the world is the Burj Khalifa skyscraper at 828 m (2,717 ft). Listed are guyed masts (such as telecommunication masts), self-supporting towers (such as the CN Tower), skyscrapers (such as the Willis Tower), oil platforms, electricity transmission towers, and bridge support ...
The city with the most supertall buildings is Dubai at 33 entries, followed by Shenzhen and New York City with 21 and 18 supertall buildings respectively. As of March 2025 [update] , there are 71 cities across the world with at least one supertall building, and 250 completed supertall buildings in the world.
Was briefly the tallest tower in the world in 2010. Second tallest tower in the world. 3: CN Tower: 553.3 m (1,815 ft) 1976: Concrete Canada: Toronto: Tallest freestanding structure in the world 1975–2007, and the world's tallest tower until 2009; tallest in the western hemisphere: 4: Ostankino Tower: 540.1 m (1,772 ft) 1967 Russia: Moscow