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It is not to be confused with KOLN. Cologne (English pronunciation: /kÉËloÊn/; German: KÃ¶ln, pronounced [kÅln], Colognian: KÃ¶lle [ËkÅÉ«É]) is the largest city in the German federal State of North Rhine-Westphalia and the fourth-largest city in Germany (after Berlin, Hamburg, and Munich).