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 21,500 spectators. Wikipedia