Fort de la Fraternité

Fort de la Fraternité stands on îlot du Diable with remaining structures including a gunpowder magazine featuring rectangular tiles and detailed guttering system.

Built in 1791 around a gun battery from 1695, the fort integrated into the defense network of Brest strait before its military abandonment in 1870.

The fort exemplifies French coastal military engineering, with architectural elements reflecting both civil and military construction methods of the late 18th century.

The ruins remain accessible to visitors, with the gunpowder magazine and sections of the parapet wall maintained through local conservation initiatives.

The site contained a limestone seam that supported an active mining operation until 1875, with a lime kiln dating from 1800 still visible.

Location: Roscanvel

GPS coordinates: 48.30788,-4.57269

Latest update: June 23, 2025 10:00