Allianz Arena is a football stadium in Munich, Bavaria, Germany, with a 70,000 seating capacity for international matches and 75,000 for domestic matches. Widely known for its exterior of inflated ETFE plastic panels, it is the first stadium in the world with a full colour changing exterior. Located at Werner-Heisenberg-Allee 25 at the northern edge of Munich's Schwabing-Freimann borough on the Fröttmaning Heath, it is the second-largest stadium in Germany behind the Westfalenstadion in Dortmund.