Cézon Island and its fort

Timeline

Heritage classified

Key figures

Origin and history

The island of Cézon, accessible at low tide, is located at the mouth of the Aber-Wrac Its name would come from Breton saozon ("saxon" or "English"). From the Roman era, the island was fortified to protect this major port of release, which had been cited since the 14th century as a shelter for privateers and commercial ships. The only deep-water anchorage between Brest and Roscoff, Aber-Wrac-h, provided a strategic refuge, only 30 km from the Brest arsenal, vulnerable to an enemy landing by land.

In 1685, Vauban chose Cézon to establish a fort there, as part of a more ambitious initial project (4 fortified islands). In the absence of means, only Cézon was built between 1694 and 1705 under the direction of engineer Isaac Robelin. The fort, centered on an oval artillery tower, included barracks, batteries, powder shops (1859), and a pellet oven (1808). A cure was added in the 19th century. The garrison, composed of 35 to 55 men, had 6 cannons (2 of 18 pounds, 4 of 12 pounds) and 2,807 pounds of powder.

The island, attacked by the English during the revolutionary and Napoleonic wars, was downgraded in 1889. During the Second World War, the Germans built 15 blockhouses, turrets and shelters, superimposing three centuries of fortifications. Classified as a historic monument in 2015, the island was acquired in 1957 by a private individual and restored since 1994. In 2020, the Coastal Conservatory became the owner of a new backup program.

The fort illustrates the evolution of defensive strategies, from Vauban to German occupation. Its flag mast allowed signal communication with ships, highlighting its key role in maritime surveillance. Successive redevelopments (XIX-XX centuries) make it a unique example of the building of fortifications, combining classical military architecture and the vestige of World War II.

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