The Stade Pierre-Mauroy, also known as the Decathlon Arena – Stade Pierre-Mauroy for sponsorship reasons, is a multi-use retractable roof stadium in Villeneuve-d'Ascq (Métropole Européenne de Lille), France, that opened in August 2012. It has a seating capacity of 50,186 and is the home stadium of Lille OSC. Wikipedia