Where is Aachen located?

Aachen is situated on the banks of the Rhine River, which is one of the most important rivers in Europe, flowing from Switzerland through Germany and into the Netherlands. The city is located near Germany's borders with Belgium and the Netherlands, making it a significant historical and cultural location. Aachen has a rich history, particularly as a favored residence of Charlemagne, the first Holy Roman Emperor, who established it as a center of learning and culture in the early Middle Ages.

The other rivers listed in the options help identify their geographical context but do not pertain to Aachen. The Elbe and Danube rivers flow through different regions of Germany and beyond, while the Seine primarily runs through France. Thus, referring to the Rhine River highlights the correct geographical identity of Aachen, supporting its historical and cultural significance within the region.