The Château des Rohan is Pontivy's most famous landmark and was the seat of one of Brittany's most powerful families. Built in the 15th century, the castle is open to the public and retains many original features. The two circular towers at the front and the facade are topped with machicolations, a type of battlement that allowed the castle's defenders to drop objects from the walls. Beseiged in 1488 during the Duchy of Brittany War of Independence and taken by Catholic forces in the Wars of Religion in 1539, the castle has seen battle several times. Today, the scene here is far more peaceful and the castle often hosts art exhibitions throughout the year.