Hoesch AG was a major steel and mining company located in the Ruhr district of Germany. The company was founded in 1871 by Leopold Hoesch in Dortmund as an iron and steel works. The company was taken over in 1991 by former Krupp Group in a hostile take over. The company became Krupp-Hoessch and is now known as ThyssenKrupp following another merger/takeover in ?.