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.
Contemporary architecture
The Burj Khalifa in Dubai, United Arab Emirates is the tallest structure in the world, standing at . Construction of the Burj Khalifa began in 2004, with the exterior completed 5 years later in 2009. The primary structure is reinforced concrete. Burj Khalifa was designed by Adrian Smith, then of Skidmore, Owings & Merrill (SOM). He also was lead architect on the Jin Mao Tower, Pearl River Tower, and Trump International Hotel & Tower