Château de Trécesson

Trécesson was mentioned as the seat of the lords of Ploërmel and Campénéac from the 8th century. The Trécesson family is documented from the 13th century — its first known representative was the knight Jean de Trécesson, whose grandson was Constable of Brittany in the 14th century — and the château remained the property of the Carné-Trécesson family until 1773, when the last of that line, Agathe de Trécesson, married René-Joseph Le Preste de Châteaugiron.

The castle's imposing reddish schist walls are reflected in the lake that surrounds it: the front gate is reached by a bridge over the moat and guarded by a gatehouse flanked by two narrow corbelled towers joined by an old gallery with machicolations. A long, almost windowless frontage under a steep slate roof ends in a hexagonal corner tower, and around the trapezoidal courtyard stand an 18th-century corps de logis, domestic buildings protected by a watchtower, and a small 15th-century seigneurial chapel.

In 1793 the château passed to Nicolas Bourelle de Sivry, and subsequently to the Perrien, Montesquieu and Prunelé families. Standing near the Paimpont forest on the edge of the military camp of Coëtquidan, it remains a private property and has been listed since 2012 as a monument historique.