Olympiacos is a professional sports club based in Piraeus, Greece, founded in 1925. It is best known for its football team, which competes in the Super League Greece and has won numerous national championships, making it one of the most successful clubs in Greek football history. In addition to football, Olympiacos has teams in various other sports, including basketball, volleyball, and water polo. The club's colors are red and white, and its home matches are played at the Karaiskakis Stadium, which has a capacity of over 30,000 spectators.