What became the world's tallest building in 1973?
History of the world's tallest buildings 101 in 2008 to become the building with the highest occupied floor. Using the criteria of highest tip (including antennae), the World Trade Center in New York City was the world's tallest building from 1972 to 2000, until the Sears Tower in Chicago (which already had a higher occupied floor than the World Trade Center) had its antenna extended to give that building the world's tallest tip; a title it held until the 2010 completion of Burj Khalifa. Petronas Towers and Taipei 101 were never the world's tallest buildings by the highest–tip criteria. Since 2010, Burj Khalifa has been the
World Trade Center (1973–2001) When completed in 1973, the South Tower, Two World Trade Center (the South Tower) became the second tallest building in the world at ; the South Tower's rooftop observation deck was high and its indoor observation deck was high. Each tower stood over high, and occupied about of the total of the site's land. During a press conference in 1973, Yamasaki was asked, "Why two 110-story buildings? Why not one 220-story building?" His tongue-in-cheek response was: "I didn't want to lose the human scale." When completed in 1972, 1 World Trade Center became the tallest building in the world for