RuhrpolenRuhrpolen (ˈʁuːɐ̯ˌpoːlən, “Ruhr Poles”) is a German umbrella term for the Polish migrants and their descendants who lived in the Ruhr area in western Germany since the 19th century. The Poles (including Masurians, Kashubians, Silesians, and other groups) migrated to the rapidly industrializing region from Polish-speaking areas of the German Empire. The immigrants mainly came from what was then eastern provinces of Germany (Province of Posen, East Prussia, West Prussia, Province of Silesia), which were acquired by the Kingdom of Prussia in the late-18th-century Partitions of Poland or earlier, and which housed a significant Polish-speaking population.
BochumBochum (ˈboʊxʊm , also US-əm , ˈboːxʊm; Baukem) is a city in North Rhine-Westphalia. With a population of 372,348 (April 2023), it is the sixth largest city (after Cologne, Düsseldorf, Dortmund, Essen and Duisburg) of the most populous German federal state of North Rhine-Westphalia and the 16th largest city of Germany. On the Ruhr Heights (Ruhrhöhen) hill chain, between the rivers Ruhr to the south and Emscher to the north (tributaries of the Rhine), it is the second largest city of Westphalia after Dortmund, and the fourth largest city of the Ruhr after Dortmund, Essen and Duisburg.
Ruhr (river)NOTOC The Ruhr is a river in western Germany (North Rhine-Westphalia), a right tributary (east-side) of the Rhine. The source of the Ruhr is near the town of Winterberg in the mountainous Sauerland region, at an elevation of approximately . It flows into the lower Rhine at an elevation of only in the municipal area of Duisburg. Its total length is , its average discharge is at Mülheim near its mouth. Thus, its discharge is, for example, comparable to that of the river Ems in Northern Germany or the River Thames in the United Kingdom.
DortmundDortmund (ˈdɔʁtmʊnt; Westphalian Düörpm ˈdyːœɐ̯pm̩; Tremonia) is the third-largest city in North Rhine-Westphalia, after Cologne and Düsseldorf, and the eighth-largest city in Germany. With a population of 609,000 inhabitants, it is the largest city (by area and population) of the Ruhr as well as the largest city of Westphalia. It lies on the Emscher and Ruhr rivers (tributaries of the Rhine) in the Rhine-Ruhr Metropolitan Region and is considered the administrative, commercial, and cultural centre of the eastern Ruhr.
RuhrThe Ruhr ('rʊər ; Ruhrgebiet ˈʁuːɐ̯ɡəˌbiːt, also Ruhrpott ˈʁuːɐ̯pɔt), also referred to as the Ruhr area, sometimes Ruhr district, Ruhr region, or Ruhr valley, is a polycentric urban area in North Rhine-Westphalia, Germany. With a population density of 2,800/km2 and a population of over 5 million (2017), it is the largest urban area in Germany. It consists of several large cities bordered by the rivers Ruhr to the south, Rhine to the west, and Lippe to the north. In the southwest it borders the Bergisches Land.
