History of the Ruhr and steel industries have declined drastically History of the Ruhr The actual boundaries of the Ruhr vary slightly depending on the source, but a good working definition is to define the Lippe and Ruhr as its northern and southern boundaries respectively, the Rhine as its western boundary, and the town of Hamm as the eastern limit. In the Middle Ages, local power was vested primarily in the counts ("Grafen") of Berg, Mark and Cleves. The left bank of the Rhine was held by the Archbishop of Cologne. The Hellweg was an important trade route crossing the region from Duisburg to
S6 (Rhine-Ruhr S-Bahn) S6 (Rhine-Ruhr S-Bahn) Line S 6 is a S-Bahn line in the Rhein-Ruhr network. It calls, among others, at the cities of Essen, Düsseldorf and Cologne and was one of the first S-Bahn lines in the Rhine-Ruhr network, becoming operational on 28 September 1967 between Ratingen Ost and Düsseldorf-Garath. It is operated at 20 minute intervals using coupled sets of class 422 four-car electrical multiple units. Line S 6 runs over lines built by various railway companies: It was opened on 28 September 1967 between Ratingen Ost and Düsseldorf-Garath. It was extended from Ratingen Ost to Essen on 26 May