Château du Bois de la Roche, Medieval castle in Néant-sur-Yvel, France.

The Château du Bois de la Roche stands on a hill above the Yvel, 3.3 km north of Néant-sur-Yvel. The present building is a three-storey stone logis with a grey slate roof, dormer windows, chimneys, and two cylindrical towers with conical roofs; a lower stone wing extends to the right. Of the medieval fortress's nine towers, only one tower of the châtelet remains.

The seigneurie du Bois de la Roche was raised to a banner in 1451 for Guillaume de Montauban, to a viscounty in 1517 by Anne of Brittany for Philippe de Montauban, chancellor of Brittany, and to a county in 1607 under Henri IV for Henri de Volvire. The present castle was rebuilt at the end of the 15th century by Philippe de Montauban on a hill above the Yvel, about 1 km west of the old moated castle. Taken in 1592 by the Ligueurs under the barons de Lannion and de Camors, it stayed in their hands until 1598, its archives destroyed and its woods pillaged. In 1793 part of it was burned in a fight between Chouans and Republicans, who then partly dismantled it lest it shelter the Chouans.

The seigneurie of Bois de la Roche held high justice over the parishes of Néant, Campénéac, Guilliers, Mauron, Saint-Brieuc-de-Mauron and Tréhorenteuc, whose churches the châtelains founded. Each year a quintaine or soule was run in the castle's great courtyard and in the bourgs of Néant, Saint-Brieuc-de-Mauron and Tréhorenteuc. The chapel, dedicated to Sainte Anne, became the parish church in 1846.

The castle was registered as a historical monument in 2001, and its facades, roofing, and surrounding grounds are protected. Visitors should know that it remains a private property, and access may be limited accordingly.

The seigneurie of Bois de la Roche held high justice, with its own court, prisons, pillory and a four-pillared gallows. It also owned water mills on the Yvel and a windmill, plus 600 hectares of land and four farmsteads.