Borussia Dortmund is a football club in Germany.
Borussia Dortmund . Dortmund plays in the Bundesliga , the top tier of the German football league system . Dortmund is one of the most successful clubs in German football history . Borussia Dortmund was founded in 1909 by eighteen football players from Dortmund . The stadium is the largest in Germany and Dortmund has the highest average attendance of any association football club in the world . 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 .