Recklinghausen (rĕkˈlĭnghouˌzən) [key], city (1994 pop. 127,150), North Rhine–Westphalia, W Germany, an industrial center and transshipment point for the Ruhr district. Manufactures include iron and steel, machinery, chemicals, and textiles. Recklinghausen was chartered c.1230 and was held until 1803 by the archbishopric of Cologne. In 1815 it came under Prussian sovereignty. The city retains part of its medieval fortifications and a Romanesque church.