Rosnay

Rosnay was the seat of a châtellenie in Champagne, a lordship whose dependencies once included a large number of fiefs. Its lands were later associated with the county of Vertus. Among its lords was François de l'Hospital, a marshal of France and royal governor of Champagne and Brie in the seventeenth century. The village lay in the country near the rivers of the Aube basin, where small lordships and their dependencies formed part of the patchwork of Champagne's historic administration.