At the beginning of 1689, fearing an attack on Brest, Louis XIV sent Vauban who ordered the construction of a number of works, including a fort at Camaret. The structure is a hexagonal construction, containing vaulted rooms. At both ends of the semi-circular and paved battery that extends at the foot of the tower, there is a red ball oven and a guard guard whose loopholes defend the access to the drawbridge. The walls of the ditch, built of unboiled stones, allow water to pass through, allowing the rising tide to fill the ditch. The work was built with stones taken from the bottom of the harbour, and coated externally with a layer of red cement. The walls and vaults of the rooms are made of granite. This tower supported a siege against the English in 1694.

Édifice militaire, enceinte urbaine, Monument historique i Patrimoine mondial de l'UNESCO