This office building, Indéfense, in the new Les Groues district in Nanterre is directly linked to the adjacent hotel. The link is made by a large staircase that runs from the ground all the way up to the 7th floor. The office is overlooking the Grand Arche of La Défense and Paris.^e verdieping loopt. Het kantoor heeft uitzicht op de Grand Arche van La Défense en Parijs.

The facade has the appearance of a chessboard. The sloping and angled cassettes create a colourful whole that varies throughout the day and the seasons. The facade panels also serve as natural sun protection.

The building is awaiting the BREEAM Excellent certificate. Alumet has anodized more than 10,000 m2 of profiles and panels in the colour AluCopper03.