Bertheaume Fort

Fort de Bertheaume. Source : GNU Free Documentation License

This construction, which was fortified by Vauban in the 17th century, surveys the entrance to the Brest narrows.


This 38 metre high islet with its natural beauty, battered by wind and tide, overlooks the entrance to the Brest Narrows. Protected by the sea but accessible at low tide, it has been used as a refuge since prehistoric times. Its position made it highly coveted, and the Dukes of Brittany set Le Perzel Château on it in the 5th century. However, its moment of glory came during the 17th century, when the King's engineer proposed that the island be fortified by building on the existing ruins. Vauban established a battery which was involved in driving back the English.


At the end of the 19th century, the islet was abandoned and a more powerful battery was created on land, behind it. The last time it was armed was by the Germans, who sited 75mm and 20mm canons on it, and hid machine guns around the fort. Under heavy bombardment, it surrendered to American troops in September 1944.

Bertheaume lay abandoned for 45 years until it was reborn out of its turbulent history in 1992. After Herculean restoration work (when workmen physically carried materials to the site) it was opened to the public once again.


Today, the accurately restored site invites you to discover its past through numerous exhibitions and events.


Bertheaume Fort

Tel: +33.(0)


Group visits can be arranged on request. Evening visit entitled "Tales of Bertheaume": every Wednesday in summer


Open April to November: 5 April to 4 May 2pm to 6.30pm every day. 5 May to 27 June and 6 to 28 September, 2pm to 6.30pm Tuesday to Sunday. 28 June to 31 August: 10am to 7pm.
October: 2pm to 6pm on Wednesdays and Sundays, 25 October to 2 November 2pm to 6.30pm every day. Open 2pm to 6pm on 5, 8, 9, 10 and 11 November.


Ticket office closes 1 hour before the site.

Entrance: Adults: €3.80 Preferential rate: €2.90 Reduced tariff (young people aged 12-18, students and job seekers): €2.10 Children aged 6-11: €0.80

Plougonvelin village official website



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    Practical information


    fort berthaume 29217
    02 98 48 30 18


    Plein tarif: 2 € Gratuit : Moins de 11 ans

    Weekly opening hours

    DU 30 juin au 31 août: 11h à 18h