Westfalenstadion is a football stadium in Dortmund, North Rhine-Westphalia, Germany, which is the home stadium of Borussia Dortmund. Officially called Signal Iduna Park [zɪɡˌnaːl ʔiˈduːna ˌpaʁk] for sponsorship reasons and BVB Stadion Dortmund in UEFA competitions, the name derives from the former Prussian province of Westphalia. It has a league capacity of 81,365 (standing and seated) and an international capacity of 65,829 (seated only). Wikipedia