The Dortmunder Philharmoniker (Dortmund Philharmonic) are a German symphony orchestra based in Dortmund. The orchestra of the Theater Dortmund performs both opera in the Opernhaus Dortmund and concert in the Konzerthaus Dortmund. The orchestra was founded originally in 1887 and has been shaped by conductors such as Wilhelm Schüchter, Marek Janowski, Moshe Atzmon and Jac van Steen.