The Krupp steelworks, or Krupp foundry, or Krupp cast steel factory (German: Krupp-Gussstahlfabrik [Guss+stahl+fabrik]) in Essen is a historic industrial site of the Ruhr area of North Rhine-Westphalia in western Germany that was known as the "weapons forge of the German Reich" (Waffenschmiede des Deutschen Reiches).
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