Taipei: On October 9, the uppermost and final spire segment was raised into place on Taipei 101 in Taipei, Taiwan. At 509.2 meters, the 101-storey tower now officially holds the world's tallest building title previously held by Petronas Tower 1 and Petronas Tower 2. The Willis Tower still holds the title of the world's tallest building to the tip of the antenna at 527 meters. Taipei 101 now also holds the highest roof (449 m) and highest occupied floor (439 m) titles.