Poudrière de la Ville close
MonumentHidden Treasure
Poudrière de la Ville close, located in Concarneau (Département 29), is a medieval landmark built in the Middle Ages. The monument is currently closed to visitors.
Key facts
- Type
- autre
- Period
- Medieval (11th-15th century)
- Location
- Concarneau, Département 29, Bretagne
- Visit
- Closed to visitors
- GPS
- 47.8724, -3.9133
- Mérimée Reference
- PA29000106
Nestling in the heart of the walled town of Concarneau, this 19th-century powder magazine is the heir to two centuries' worth of defensive expertise, and has preserved its original blast-proofing intact.
History
In the heart of the famous walled town of Concarneau, a fortified island surrounded by the waters of Concarneau Bay, stands a discreet powder magazine that was for a long time the strategic heart of the Breton citadel. Built between 1835 and 1837, it belongs to that category of monuments that you don't notice at first glance, but whose every stone tells a story of gunpowder, coastal wars and military ingenuity. What makes this building truly exceptional is its remarkable state of preservation. Unlike many military structures of the same type that have been converted or partially demolished over the decades, the Concarneau powder magazine has retained all its original features: the insulating mezzanine floor, the system of vents allowing air to circulate to prevent any accumulation of flammable vapours, and its perimeter wall, a veritable shield designed to contain the effects of any explosion. It is this architectural integrity that earned it its listing as a Historic Monument in 2019. To visit the powder magazine is to enter a world where the technical rigour of French military engineering is expressed in every constructive detail. The sobriety of the building contrasts with the rich history it contains: you can see the thinking of the engineers of the Corps royal du Génie, obsessed with safety and functionality at a time when one mistake could blow up the entire citadel. The powder magazine is part of the picturesque and monumental setting of the walled city, whose 15th-century ramparts, modified in the 17th and 18th centuries by royal engineers, have stood the test of time. From the granite-paved streets that surround it, the atmosphere is that of a living conservatory of Breton military architecture, where each building contributes to the coherence of this defensive complex, unique on the French Atlantic coast. Now part of a major tourist attraction in southern Brittany, the powder magazine is a rare and precious testimony to the art of storing gunpowder in a fortified coastal environment, at a time when Concarneau was still playing an active role in monitoring the maritime approaches to Finistère.
Architecture
The Concarneau powder magazine is part of the standardised model for French military powder magazines codified by the royal engineers in the 17th century and refined under Napoleon. The building has a simple, squat volume, typical of this type of construction: a low building made of local granite masonry, with a slightly sloping roof designed to limit the surface area exposed to shocks and splinters in the event of an accident. The overall effect is one of functional austerity, typical of the utilitarian military architecture of the early 19th century. The most remarkable technical feature of this building is the blast-proof system, which has been preserved in its entirety. The raised mezzanine floor insulates the gunpowder storage floor from the dampness of the ground, the sworn enemy of ammunition conservation. The system of vents - small openings in the walls - ensures permanent, controlled ventilation, preventing the build-up of potentially explosive vapours. Finally, the perimeter wall that encircles the building a few metres away is the last line of defence against blast effects: in the event of an accidental explosion, this wall is designed to absorb and deflect the shock wave, limiting collateral damage to the rest of the citadel. The materials used are those of the Breton military engineers of the time: local granite, robust and rot-proof, dominates all the masonry. The ironwork, carefully selected to avoid any risk of sparks, also contributes to the passive safety of the building. The absolute sobriety of the building's decoration bears witness to an architecture that is entirely subservient to its function, with no concession to aesthetics, but not without a certain elegance in the purity of its volumes.
Related Figures
Vauban (Sébastien Le Prestre de Vauban) — maréchal et ingénieur militaire du XVIIe siècle, dont les doctrines sur les fortifications côtières et les poudrières ont directement inspiré le modèle constructif appliqué à ConcarneauIngénieurs du Corps royal du Génie militaire — concepteurs anonymes de la poudrière, formés à l'École polytechnique et appliquant les normes techniques du ministère de la GuerreLouis-Philippe Ier — roi des Français sous la monarchie de Juillet, dont le règne (1830-1848) voit la construction de la poudrière dans le cadre de la modernisation des places fortes côtièresAnne de Bretagne — duchesse de Bretagne (1477-1514), dont les politiques de fortification de la Ville close ont posé les bases du dispositif défensif au sein duquel la poudrière s'inscrit
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Frequently Asked Questions
Where is Poudrière de la Ville close located?
Poudrière de la Ville close is located in Concarneau, Département 29 department, Bretagne region, France.
When was Poudrière de la Ville close built?
Poudrière de la Ville close dates back to a period built in the Middle Ages (11th-15th century).
Is Poudrière de la Ville close open to visitors?
Poudrière de la Ville close is currently closed to visitors.