The Petronas Towers or Petronas Twin Towers in Kuala Lumpur, Malaysia are a pair of twin towers that were the tallest buildings in the world in 1998-2004, before being surpassed by the Burj Khalifa and Taipei 101. However, these two towers are still the tallest twin skyscrapers in the world as of 20th century. The Petronas Twin Towers held the title as the tallest building from 1998 to 2004 based on measurements from the main entrance floor to the superstructure, according to the building's original height reference used by the international organization Council on Tall Buildings and Urban Habitat since 1969 (three additional height categories were introduced when the tower was nearly completed in 1996).
