Château de Beauregard, Heritage site in Saint-Avé, France

Château de Beauregard is an L-shaped building with two storeys, mainly dating from the 18th and 19th centuries. Its long, pale cream facade has a regular grid of tall windows with white frames and dark shutters across three levels; the central section projects slightly and is topped by a small square cupola with a clock face below it. A dark metal gate flanked by two stone pillars opens onto the property, which stands on a height east of Saint-Avé.

The present château was built in the mid-18th century on the site of the older Kerspihuiry manor, held by Pierre Rolland in 1514; its last remains vanished during 19th-century enlargement works. On 14 February 1800 the Chouan general Georges Cadoudal and republican general Guillaume Brune signed the pacification treaty of Brittany here. The architect Lucien Douillard, owner from 1878, carried out major works before passing it to his son-in-law, Marquis Guyot d'Asnières de Salins, in 1883.

The château's name, Beauregard, refers to the view over the Gulf of Morbihan from its hill east of Saint-Avé. A private chapel once stood on the grounds; it was moved at an unknown date into the north transept of the parish church of Saint-Avé, alongside the chapel of the neighbouring Lesnevé manor in the south transept. Since 1999 the building has been rented out for receptions.

The château stands east of Saint-Avé on a height from which the Gulf of Morbihan, about 12 km away as the crow flies, can be seen. It is a private building, used for receptions since 1999 and as the head office of the transport company Rouxel since its purchase in September 2014, so it is not open to visitors.

On 14 February 1800 the château was the setting for the signing of the pacification treaty of Brittany between the Chouan general Georges Cadoudal and the Republican general Guillaume Brune. The building is L-shaped and has two storeys.