The Constant Vanden Stock Stadium, also known as the Lotto Park for sponsorship reasons, is a football stadium in the municipality of Anderlecht in Brussels, Belgium. It is home to R.S.C. Anderlecht. It also hosted the UEFA Euro 1972 semi-final between Hungary and the Soviet Union, as well as several games of the Belgium national football team. The cap…The Constant Vanden Stock Stadium, also known as the Lotto Park for sponsorship reasons, is a football stadium in the municipality of Anderlecht in Brussels, Belgium. It is home to R.S.C. Anderlecht. It also hosted the UEFA Euro 1972 semi-final between Hungary and the Soviet Union, as well as several games of the Belgium national football team. The capacity nowadays is 22,500 spectators. The former amount of 40,000 seats and standing places was gradually reduced due to safety measures.