The Commerzbank-Arena (German pronunciation: [koˈmɛʁt͡sbaŋk ʔaˈʁeːna], sometimes [kɔˈmɛʁt͡s-]) is a sports stadium in Frankfurt, Hesse, Germany. Commonly known by its original name, Waldstadion [ˈvaltˌʃtaːdi̯ɔn] (English: Forest Stadium), the stadium opened in 1925. The stadium has been upgraded several times since then; the most recent remodelling was its redevelopment as a football-only stadium in preparation for the 2005 FIFA Confederations Cup and 2006 FIFA World Cup. With a capacity of 51,500 spectators for league matches and 48,500 for American Football and International Football matches, it is among the ten largest football stadiums in Germany.