List of tallest buildings and structures
The tallest artificial structure is Burj Khalifa, a skyscraper in Dubai that reached in height on January 17, 2009. By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA. That September it officially surpassed Poland's Warsaw radio mast, which stood from 1974 to 1991, to become the tallest structure ever built. Guyed lattice towers such as these masts had held the world height record since 1954.
List of tallest buildings by country
The following is a list of the tallest buildings in the world by country listing only the tallest building in each country. The list is including only completed (or at least topped-out) buildings. A total of 20 countries featured in the list have supertall skyscrapers (300 m and more). Many countries have constructed new tallest buildings in the 2010s, with the oldest tallest building in a country being St. Olaf's Church in Tallinn, Estonia, which has stood as the country's tallest building since 1519.