Commerzbank-Arena (German pronunciation: [koˈmɛʁtsbaŋkʔaˌʁeːnaː], sometimes [kɔˈ-]) is a retractable roof sports stadium in Frankfurt, Hesse, Germany. Commonly known by its original name, Waldstadion [ˈvalt.ʃtaːdi̯ɔn] (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. The stadium was one of the nine venues of 2011 FIFA Women's World Cup, and hosted four matches including the final.
The sports complex, which is owned by the city of Frankfurt, includes the actual stadium and other sports facilities, including a swimming pool, a tennis complex, a beach volleyball court and a winter sports hall. The arena has its own railway station, Frankfurt Stadion, on the national rail network.
The Commerzbank-Arena is home stadium of football club Eintracht Frankfurt whose offices are also located on the premises.