Borussia Dortmund GmbH & Co. Kommanditgesellschaft auf Aktien is a German company engaged in the football business through its subsidiaries. It operates a professional football club and markets the Signal Iduna Park stadium. The company also provides ticketing, TV broadcast rights marketing, advertising, merchandising, match operations, transfer deals, and conference services. Additional activities include stadium tours, event staffing, internet and travel services, and an interest in a medical rehabilitation center. Founded in 1909, it is based in Dortmund, Germany.