Located near Dinan and surrounded by woods, the castle of Chalonge is discovered from the road. The buildings (house, outbuildings, orangery, farm) are due to Louis-Pierre-Marie de Lorgeril, born in 1744\. The construction, which took place around 1785, was not entirely completed by the Revolution. The dovecote and the chapel are the remains of a previous construction. The building is preceded by a large courtyard closed by a gate and its southern facade overlooks a French garden limited by moats.

Château, hôtel urbain, palais, manoir i Monument historique