Château de Châteaubriant

The Château de Châteaubriant is a medieval castle strongly modified during the Renaissance, located in the commune of Châteaubriant in the Loire-Atlantique département of France. The original castle was founded in the 11th century on the eastern border of Brittany and, such as the fortresses in Vitré, Fougères, Ancenis and Clisson, it was defending the duchy against Anjou and the Kingdom of France.

The castle was renovated several times during the Middle Ages and the town of Châteaubriant developed at its side. During the Mad War, the castle was seized by the French after a siege. The keep and the halls, partially destroyed, were renovated in the flamboyant style. Eventually, during the 16th century, the château obtained its definitive appearance when the new Renaissance palace was built against the medieval enceinte.