Lying on the banks of the Oust, Josselin is a key stop on the 'Route des Ducs de Bretagne'. The town's history is closely bound to that of the castle which stands guard over it. Built in a flamboyant Gothic style, it provides a striking example of feudal and Renaissance architecture. Founded in the early 11the century, it is still inhabited today by the descendants of its founders, the Rohan family. Make time for a stroll through the gardens. They were laid out by Achille Duchesne, a landscape gardener who also worked at Vaux-le-Vicomte.