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About: History of the Ruhr     Goto   Sponge   NotDistinct   Permalink

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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. As a result of the Congress of Vienna, the entire area came under the control of Prussia (the state had already gained possessions there). This event was almost concomitant with developments which would eventually make the region one of the most important industrial areas in the world.