The Promenade des Fossés follows the trace of the old ramparts which encircled the town in the Middle Ages which then had a series of seven round towers. The Porte Neuve (a gateway built from the 14 to the 16C) is flanked by two roughwork, machicolated towers. The Porte Ste-Croix (Holy Cross Gateway) commemorates the time when St Bernard preached about the 2nd crusade; a cross also commemorates this event. The promenade ends on the castle terrace.