The evolution of Signal Iduna Park (Westfalenstadion) through the years from 1974 to 2022. Signal Iduna Park is a football stadium in Dortmund. It is the home stadium of Borussia Dortmund. Opened in 1974 and with a capacity of 81,365, it is the largest stadium in Germany. Westfalenstadion is officially called Signal Iduna Park for sponsorship reasons and BVB Stadion Dortmund in UEFA competitions, the name derives from the former Prussian province of Westphalia.
