The Dampierre estate, whose former castle was rebuilt in 1683 by architect Jules Hardouin Mansart (1646-1708), had been privately owned by the Luynes family since 1680. It changed hands in 2018 with a view to reopening to the public.
That same year, the agency developed a master plan for restoration and enhancement, defining the major stages of an ambitious project combining built and landscape heritage. While working with a private sponsor committed to enhancing the estate, it recently helped to breathe new life into one of the finest examples of French-style landscaping, with its flowerbeds, perspectives, and formal groves, set in the heart of a wooded park covering more than 375 hectares. This estate, already listed as a Historic Monument since 1928, was classified in 2022.