River City on the Rhine is a term that refers to two cities located on the Rhine River in Germany. The first city is Bonn, which is a four-letter city located in the state of North Rhine-Westphalia. It is the former capital of West Germany and is known for its cultural heritage and its many universities. The second city is Basel, which is a five-letter city located in the state of Basel-Stadt. It is a major industrial and commercial center and is home to the world's largest pharmaceutical companies.