The Château de Montarnal was a fortified site in the 11th century, evidenced by the circular south tower. New fortifications were undertaken around the middle of the 14th century (seigneurial hall). In the Middle Ages, the castle was used as an entrepôt for the transport of wood, wine and salt - a cave was used as a warehouse. The site was a stop on the pilgrim route to Saint-Jacques de Compostelle. The architectural and military layout is unique in the Rouergue. The castle today still has the keep, enceinte, courtyard and the cave.