![the Rhine harbor in the district Muelheim, in the background the cathedral, Cologne, Germany. der Rheinhafen im Stadtteil Muelheim, im Hintergrund de Stock Photo - Alamy the Rhine harbor in the district Muelheim, in the background the cathedral, Cologne, Germany. der Rheinhafen im Stadtteil Muelheim, im Hintergrund de Stock Photo - Alamy](https://l450v.alamy.com/450v/2j1e5bk/09092021-germany-north-rhine-westphalia-muelheim-an-der-ruhr-city-view-of-muelheim-an-der-ruhr-in-front-the-muega-park-in-the-back-the-city-w-2j1e5bk.jpg)
the Rhine harbor in the district Muelheim, in the background the cathedral, Cologne, Germany. der Rheinhafen im Stadtteil Muelheim, im Hintergrund de Stock Photo - Alamy
![Figure 21: The location of the Ruhr region in German (Source: (Ruhr... | Germany map, Rhineland, Bochum Figure 21: The location of the Ruhr region in German (Source: (Ruhr... | Germany map, Rhineland, Bochum](https://i.pinimg.com/564x/ae/9b/c3/ae9bc3b27f4f142efd6f09a993453055.jpg)
Figure 21: The location of the Ruhr region in German (Source: (Ruhr... | Germany map, Rhineland, Bochum
![Dortmund - city in Ruhrgebiet (Ruhr Metropolitan Region) in Germany. Aerial view Stock Photo - Alamy Dortmund - city in Ruhrgebiet (Ruhr Metropolitan Region) in Germany. Aerial view Stock Photo - Alamy](https://l450v.alamy.com/450v/pp67gx/dortmund-city-in-ruhrgebiet-ruhr-metropolitan-region-in-germany-aerial-view-pp67gx.jpg)
Dortmund - city in Ruhrgebiet (Ruhr Metropolitan Region) in Germany. Aerial view Stock Photo - Alamy
![The Rhine-Ruhr metropolitan region. (Data source: Federal Statistical... | Download Scientific Diagram The Rhine-Ruhr metropolitan region. (Data source: Federal Statistical... | Download Scientific Diagram](https://www.researchgate.net/publication/225997416/figure/fig2/AS:408178262069249@1474328689756/The-Rhine-Ruhr-metropolitan-region-Data-source-Federal-Statistical-Office-authors.png)