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Key figures

Origin and history

Plancy Castle finds its origins in a medieval fortress built on the town of Plancy-l'Abbaye. This strategic site housed the heart of a powerful barony, vassal of the Counts of Troyes, and controlled a vast territory including villages such as Charny, Longueville or Viâpres-le-Grand. Its stone dungeon, surrounded by ditches and ramparts, even housed a collegiate church served by canons, emphasizing its religious and military importance.

The seigneury of Plancy was owned by a line of barons attested as early as the 11th century, such as Gillette (1080) or Hugues de Plancy (cited in 1135, 1146 and 1168). Several members took part in the crusades, like Gilles (1189) or Philip II (1218). In the 16th century, the family of La Croix acquired barony, reuniting it after divisions, before it was erected as a marquisate in 1656 for Henri du Plessis-Guénégaud, descendant of the La Croix by his mother, Mary. The castle then passed to the Godards of Aucour, of whom Adrien was prefect and his sons deputies.

The history of the castle reflects the political changes of Champagne: a medieval fortress controlling extensive lands (like Semoine, raised in Viscounty), it became a symbol of aristocratic power under the Old Regime. Marital alliances, such as that of Charlotte de Courtenay with Nicolas de La Croix, illustrate territorial consolidation strategies. The transformation into a marquisat in the 17th century marked its climax, before its integration into the heritage of the region's influential families.

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