Château du Bosc Théroulde, Historical castle in Bosc-Guérard-Saint-Adrien, France

Château du Bosc Théroulde is a castle in Normandy built with limestone and brick walls, featuring a main floor topped by an attic level underneath. A large roof covered in slate with gentle slopes protects the entire structure.

Until the 12th century the land held only six to eight houses, part of the baronnie de Fontaine le Bourg as the fief Alinette. In 1598 Jacques Le Faë, adviser to the king, bought the Alinette domaine from the Cormeilles family; building of the present Louis XIII-style brick château began in 1616 and was completed in 1632, the date 1616 carved on one of the main chimneys. His son Adrien added the chapel in 1646–1648.

The name combines bosc, old French for wood, and Théroulde, from the Scandinavian Thorvaldr, brought to Normandy by the Vikings. The chapel beside the château was built in 1646–1648 by Adrien Le Faë, named for his patron saint after he survived the plague of Rouen. A stone shield on the west wing shows the merged arms of Christophe Charles Le Faë and Madeleine Le Roux.

The château stands near Bosc-Guérard-Saint-Adrien in the Seine-Maritime département of Normandy. The brick facade with stone quoins and the 1616 date on one of the main chimneys can be seen from the grassy field in front; the chapel built in 1646–1648 stands alongside the building. Access to the interior is not documented in the sources, so arrange any visit in advance.

The date 1616 is carved on one of the main chimneys, marking the start of construction under Jacques Le Faë; the work was completed in 1632. Charles Sénateur Maze-Sensier later had the letters M A Z E engraved in the stonework around the upper windows.