country house
US /ˈkʌn.tri ˌhaʊs/
UK /ˈkʌn.tri ˌhaʊs/

1.
maison de campagne, château
a large house in the countryside, especially one that is or was formerly owned by an aristocratic or wealthy family
:
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They spent their summer holidays at their beautiful country house.
Ils ont passé leurs vacances d'été dans leur magnifique maison de campagne.
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The old country house was converted into a luxury hotel.
L'ancienne maison de campagne a été transformée en hôtel de luxe.