Fußballclub Gelsenkirchen-Schalke is a professional German association-football club and multi-sports club originally from the Schalke district of Gelsenkirchen, North Rhine-Westphalia. The "04" in the club's name derives from its formation in 1904. Schalke has long been one of the most popular professional football teams and multi-sports club in Germany, even though major successes have been rare since the club's heyday in the 1930s and early 1940s. Schalke play in the Bundesliga, the top tier of the German football league system. As of December 2015, the club has 140,000 members, making it the second-largest sports club in Germany and the sixth-largest sports club in the world in terms of membership. Other activities offered by the club include athletics (track and field), basketball, handball, table tennis, winter sports, and eSports. Founded in 1904, Schalke has won seven German championships, five DFB-Pokals, one DFL-Supercup and one UEFA Cup. Since 2001, Schalke's stadium is the Veltins-Arena. Schalke holds a long-standing rivalry with Ruhr neighbours Borussia Dortmund, arguably the most widespread and well-known rivalry in German football, and matches between the two teams are referred to as the Revierderby.