Castle of Les Jamonières, Manor house in Saint-Philbert-de-Grand-Lieu, France.

The Château des Jamonières is a château in Saint-Philbert-de-Grand-Lieu, in the Loire-Atlantique department. The estate passed through the Laval, Le Ferron and Juchault families before shipowner Fernand Crouan, who commissioned the Belem, bought it in 1882. In 2020 Olivier Marais acquired it and turned it into a hotel called Château des Marais.

In the 15th century the estate belonged to the Laval family, then passed to Jehan de Craon and Gilles de Rais before entering the Le Ferron family. Around 1700 it came to the Juchault family through the marriage of Christophe Juchault and Geneviève Bouhier de La Vérie. In 1882 the shipowner Fernand Crouan, who commissioned the Belem, bought it; in 2020 Olivier Marais converted it into a hotel.

The estate's name comes from the Juchault des Jamonières family, who held it from the early 18th century; Louis Marie Juchault des Jamonières owned it after the Revolution. In 1882 it passed to Fernand Crouan, the Nantes shipowner who commissioned the ship Belem, and then to his son René Crouan. Since 2020 the château has operated as a hotel under the name Château des Marais.

The castle is situated roughly 20 minutes from Nantes airport and about 35 minutes from the Atlantic coast, making it accessible to visitors from multiple directions. The location allows for straightforward arrival whether traveling from larger cities or coastal destinations.

The estate's 1882 buyer, shipowner Fernand Crouan, was the commissioning owner of the Belem, the three-masted barque launched in 1896 and now one of the oldest sailing ships afloat in France. The property stayed with his son René Crouan by inheritance before Olivier Marais bought it in 2020 and turned it into a hotel called Château des Marais.