Cologne Tower (German: KölnTurm) is a 44-storey, 148.5 m (487 ft) (165.48 m (542.9 ft) including antenna) office skyscraper in the Köln-Neustadt-Nord district of Cologne, Germany. Construction of the tower lasted from June 1999 to November 2001, and it is the second tallest building in the city (after the Cathedral), the second-tallest in North Rhine-Westphalia (after Post Tower in Bonn), and the twelfth tallest in Germany.