Mülheim an der Ruhr, cried "Ceety on the River" an aw, is a ceety in North Rhine-Westphalie in Germany. It is locatit in the Ruhr atween Duisburg, Essen, Oberhausen an Ratingen. It is hame o mony companies, especially in the fuid industry, sic as the Aldi Süd Company or the Tengelmann Group.