Where is cologne?

Cologne is a city in North Rhine-Westphalia, Germany. It is located on the Rhine River, between Bonn and Düsseldorf. Cologne is the largest city in the Rhineland and the fourth-largest city in Germany. The city is home to numerous historical landmarks, including the Cologne Cathedral, the Hohenzollern Bridge, and the Roman-Germanic Museum. Cologne is also a major cultural center, with a rich history of music, art, and literature.