Westfalenstadion (German pronunciation: [ˈvɛstfalənˈʃtaːdi̯ɔn]) is an association football stadium in Dortmund, North Rhine-Westphalia, Germany. It is the home stadium of the Borussia Dortmund football team playing in the German Bundesliga.The stadium is officially named Signal Iduna Park [zɪɡˈnaːl ʔɪˈduːnaː ˈpaʁk] under a sponsorship arrangement lasting from December 2005 until 2021, giving naming rights to the Signal Iduna Group, an insurance company.