The Petronas Towers were the tallest buildings in the world for six years, until Taipei 101 was completed in 2004. The height of the towers is measured to the top of their structural components such as spires, but do not include antennas. Spires are considered actual integral parts of the architectural design of buildings. The Petronas Towers still remain the tallest twin buildings in the world.
Petronas Towers - Wikipedia, the free encyclopedia