The origin of Trécesson castle is lost in the mists of time. It was mentioned as the seat of the lords of Ploërmel and Campénéac from the 8th century. The Trécesson family is documented since the 13th century and its first known representative was the knight Jean de Trécesson, whose grandson was Constable of Brittany in the 14th century. Tradition places the construction of the site at the end of the 14th century, but it is more probable that the castle, in its present position, dates from the 15th century.

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• Adress Route D312 | Ruisseau des Landes de Rohan, 56800 Ploërmel
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