Nantouillet Castle, Renaissance château in Nantouillet, France.

Nantouillet Castle is a Renaissance structure located in the Seine-et-Marne department north of Paris. The building displays characteristic architectural features of the Renaissance period within its preserved walls and fortification elements that reflect its earlier role as a fortified site.

Cardinal Antoine Duprat commissioned the building in the 16th century, constructing it over the remains of an earlier medieval fortress. This transition from military fortification to residential residence reflected the architectural shifts taking place in France during that era.

The village of Nantouillet grew around the château, and the seigneurie was held by the Duprat family, allied by marriage to the houses of Chavannes and des Barres. François I authorised two annual fairs and a weekly market on the parish in 1521, when Duprat was lord of the place.

The château stands in the heart of Nantouillet on a small natural rise, surrounded by wide moats. Its monumental portal, whose drawbridge has disappeared, opens onto the courtyard of honour leading to the main building and, beyond, the garden. The building is in a fairly degraded state and would need substantial restoration.

Antoine Duprat died at Nantouillet on 15 July 1535, and the château was listed as a historic monument in 1862. The entrance portal still shows the arrangement of a drawbridge that has since disappeared, and the building stands within a walled enclosure with massive towers and wide moats.