Borussia Dortmund is a sports club in Germany.
Borussia Dortmund . Dortmund plays in the Bundesliga , the top tier of the German football league system . Since 1974 , Dortmund have played their home games at Westfalenstadion , named after its home region of Westphalia . In terms of Deloitte 's annual Football Money League , Dortmund is the second biggest sports club in Germany and the 11th biggest football team in the world . Dortmund ( [ ˈdɔɐ̯tmʊnt ] ; Düörpm [ [ ˈdyːœɐ̯pm̩ ] ] ; Tremonia ) is an independent city in North Rhine-Westphalia , Germany .