The châteaux of Grignan, Suze-la-Rousse and the Adhémars' in Montélimar, owned by the Drôme Department, are managed by
Les Châteaux de la Drôme
A Drôme Department-owned company
The Department successively purchased the three châteaux of the Drôme between 1947 and 1955 for the Adhémars', in 1965 for Suze-la-Rousse and in 1979 for Grignan.
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