Introduction
Cologne [key], Ger. Köln, city (2021 est. metro area pop. 1,129,000), North Rhine–Westphalia, W Germany, on the Rhine River. It is a commercial, financial, and industrial center, a rail and road junction, and a river port. Its manufactures include automobile engines, engineering, electronics engineering, metals, chemicals, textiles, printed materials, and eau de cologne.
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