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Origin and history

The Castle of Penhoat is a medieval fortress built in the 13th century by William of Penhoat, a local lord returning from crusade. This type of construction reflects the influence of the Philippian castles, adapted to the defensive needs of the feudal era in Brittany, a region then marked by rivalries between lords and the Duke. When it was built, the castle was part of feudal wars and strongholds.

Brittany, under the nominal authority of the Dukes of the House of Dreux-Penthièvre, saw the increase of stone fortresses, gradually replacing the castral wooden mots. Penhoat, with its cylindrical towers, illustrates this transition to an architecture more resistant to assaults and prolonged seats. The reshuffles of the 15th century correspond to the progress of artillery, especially after the Hundred Years' War.

The walls are thickened, the towers reinforced, and a chestnut is added to the top of the south tower to improve monitoring. These changes are part of a period when Britain, then de facto independent, modernises its defences against French and English ambitions. The League's wars (1589–98) marked a tragic turning point for Penhoat.

The castle, probably held by supporters of the Duke of Mercœur (Ligueur), suffered major destruction. Today, only two sections of towers remain, and part of the eastern courtyard, silent witnesses to these religious and political conflicts that torn the region apart. In modern times, the site, abandoned as a seigneurial residence, became a stone quarry for local homes.

In the 19th century, it attracted the attention of Breton scholars, anxious to preserve a threatened medieval heritage. Partially classified as Historic Monuments in 1926, it became a place of memory, symbolizing the feudal heritage of interior Brittany. Today, the remains of the castle are freely accessible and integrated into a walking route that enhances the heritage of Saint-Thégonnec.

Sporadic archaeological excavations made it possible to specify his original plan, revealing a rectangular enclosure and a system of cascade ditches. The site participates in the tourism dynamics of the Morlaix Country, between history and Celtic legends. The local legend says that William of Penhoat brought back from the Holy Land a relic, now lost, which would have protected the castle from fires.

This oral tradition, typical of Breton folklore, reinforces the mystical aura of the place. The guided tours, organized in summer, combine history and popular narratives to captivate visitors. Finally, Penhoat is part of a network of comparable Breton castles, such as those of Tonquédec or La Roche-Maurice.

These fortresses, often built on rocky spurs, illustrate a common defensive strategy in Lower Britain. Their study allows us to understand the military and social issues of the region between the Middle Ages and the Renaissance.

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