Bayer 04 Leverkusen Fußball GmbH, also known as Bayer 04 Leverkusen is a professional football club based in Leverkusen in the state of North Rhine-Westphalia. The club competes in the Bundesliga, the top tier of German football, and plays its home matches at the BayArena. The club was founded in 1904. Bayer were first promoted to the Bundesliga in 1979, and have remained in the top division ever since. The club's main colors are red and black. Bayer Leverkusen have finished as runner-up in the Bundesliga five times without winning the competition, a record in German football. The club has won one DFB-Pokal and one UEFA Cup.