Burj Khalifa was designed by a team led by Adrian Smith of Skidmore, Owings & Merrill, the firm that designed the Sears Tower in Chicago, a previous record holder for the world's tallest building.
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Chicago is the birthplace of the skyscraper. The Home Insurance Building, completed in 1885, is regarded as the world's first skyscraper. This building used the steel-frame method, innovated in Chicago. It was originally built with 10 stories, an enormous height in the 1800s, to a height of 138 feet (42 m).
Opened in Rotterdam, 1898. The architect was Willem Molenbroek. The first modern skyscraper in Europe was built in the year 1898. Its name was The Witte Huis or The White House and the place where it was built is Rotterdam (Netherlands).
One of the best examples of the world's first skyscrapers, built around 2,500 years ago, can be seen in Yemen's capital, Sanaa. It is possible to see six-to-seven-story skyscrapers in Sanaa and 10-to-12-story edifices in the Hadramut and Shibam regions.
William LeBaron Jenney, a Chicago architect, designed the first skyscraper in 1884. Nine stories high, the Home Life Insurance Building was the first structure whose entire weight, including the exterior walls, was supported on an iron frame.
Completed in 1931, the Empire State was the world's first 100-story building – or rather, the equivalent of 102 stories, since the floors between the 86th floor observation deck and the small room at the apex of the mooring mast were only estimated levels.