Borussia Dortmund

Ballspielverein Borussia 09 e. V. Dortmund, often known simply as Borussia Dortmund (German pronunciation: [boˈʁʊsi̯a ˈdɔʁtmʊnt] ) or by its initialism BVB (pronounced [ˌbeːfaʊ̯ˈbeː] ), or just Dortmund by international fans, is a German professional sports club based in Dortmund, North Rhine-Westphalia. It is best known for its men's professional football team, which plays in the Bundesliga, the top tier of the German football league system.

Founded in 1909 by eighteen football players from Dortmund, they are nicknamed Die Schwarzgelben (The Black and Yellow), for the colours used in the club's crest. They hold a long-standing rivalry with Ruhr neighbours Schalke 04, against whom they contest the Revierderby. They also contest Der Klassiker with FC Bayern Munich. Dortmund is the largest sports club by membership in Germany after FC Bayern Munich, with about 218,000 members, making Borussia Dortmund the fifth largest sports club by membership in the world. The club also has a women's handball team. Since 1974, Dortmund have played their home games at the Westfalenstadion; the stadium is the largest in Germany, the Yellow Wall, a standing terrace in the South Stand, is the largest of its kind in Europe, and Dortmund has the highest average attendance of any association football club in the world.