The façade | ©Binche / CC-BY-SANicknamed the "Pierrefonds of Brittany", Tonquédec was raised in 1400 on river Guer's banks. With its 3 surrounding walls flanked by big towers, this fief belonged to a family of Penthièvre's side. In the 12th century, the land fell to barons de Coëtmen, also known as lords of Tonquédec.