Cologne Cathedral - Credit: ger1axg
Cologne (Köln) is Germany's fourth-largest city (after Berlin, Hamburg and Munich). During the 19th and 20th centuries Cologne absorbed numerous surrounding towns, and by World War I was home to 700,000 inhabitants.
During World War I, Cologne was the target of several minor air raids, but it survived without significant damage. Until 1926 Cologne was occupied by the British Army of the Rhine, under the terms of the armistice and the Treaty of Versailles.