Hertha, Berliner Sport-Club e.V., commonly known as Hertha BSC, and sometimes referred to as Hertha Berlin, Hertha BSC Berlin, or simply Hertha, nickname as "Die Alte Dame" are one of the teams in Bundesliga. The Olympiastadion is the home ground for Hertha BSC Berlin. The club main rival in the German League is with 1. FC Union Berlin (which is known as "Berlin derby").