Bayer 04 Leverkusen Fußball GmbH, also known as Bayer 04 Leverkusen, Bayer Leverkusen, or simply Leverkusen, is a professional football club based in Leverkusen, North Rhine-Westphalia, Germany. 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 by employees of the German pharmaceutical... Wikipedia