List of tallest buildings and structures
The world's tallest artificial structure is the Burj Khalifa in Dubai (of the United Arab Emirates). The building gained the official title of "Tallest Building in the World" and the tallest self-supported structure at its opening on January 9, 2010. The second-tallest self-supporting structure and the tallest tower is the Tokyo Skytree. The tallest guyed structure is the KVLY-TV mast.
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.