In the heart of the forest of Réno-Valdieu, discover the ruins of the ancient Chartreuse, founded in 1170 by Rotrou, count of Perche, which housed the disciples of Saint Bruno until 1791. A high place of evangelization of the Perche, it passed through the troubled periods of the 100-year war and the religious wars before serving as a stone quarry during the revolution of 1789.