The Cologne Tower is a 44-storey office skyscraper in the Köln-Neustadt-Nord district of Cologne, Germany that stands 148.5 m high, or 165.48 m, including its antenna. Construction of the tower lasted from June 1999 to November 2001. It is the second-tallest building in the city, the second-tallest in North Rhine-Westphalia after the Post Tower in Bonn, and t…The Cologne Tower is a 44-storey office skyscraper in the Köln-Neustadt-Nord district of Cologne, Germany that stands 148.5 m high, or 165.48 m, including its antenna. Construction of the tower lasted from June 1999 to November 2001. It is the second-tallest building in the city, the second-tallest in North Rhine-Westphalia after the Post Tower in Bonn, and the 22nd-tallest in Germany.