The castle of Hardelot is a castle located in the municipality of Condette in the Pas-de-Calais in France . The present castle is a mansion completed in the middle of the xix th century on foundations dating back to 1222. It has the shape of a polygon with nine towers, surrounded by two large concentric ditches and installed on a hill overlooking the wetlands and the lake mirrors . It is close to the resort town of Hardelot-Plage , station which it gave its name.