German cruiser Köln
 Köln was a light cruiser the third member of the Königsberg class that was operated between 1929 and March 1945 including service in World War II. She was operated by two German navies the Reichsmarine and the Kriegsmarine. She had two sister ships Königsberg and Karlsruhe. Köln was built by the Deutsche Werke shipyard in Kiel; she was laid down in August 1926 launched in May 1928 and commissioned into the Reichsmarine in January 1930.