Cologne is the largest city of Germany's most populous federal state of North Rhine-Westphalia, and its more than 1 million inhabitants make it the fourth most populous city in Germany.
ICologne idolobha elikhulu kunawo wonke esifundazweni saseJalimane i-North Rhine-Westphalia futhi ukuba nezakhamizi ezingaphezu kwesigidi kwenza kube idolobha lesine elinabantu abaningi eJalimane.