Château de Sagonne, Medieval castle in Sagonne, France

The Château de Sagonne stands in Sagonne in the Cher, between Berry and Bourbonnais. Its enceinte originally had eight towers and two gateways; four towers remain, along with the west and north walls, the pillars of the bartizans, part of the portcullis and 16th-century door panels. The courtyard facade dates from the 15th century, with moulded windows and 18th-century openings.

The castle originated in the medieval period but underwent major transformation after Jules Hardouin Mansart, architect of Versailles, purchased it in 1699. His alterations significantly reshaped the building's structure and interior spaces.

The castle is a Maisons des Illustres, a label honouring homes linked to notable figures, here Jules Hardouin-Mansart, who bought the seigneurie in 1699. Visitors can see the Mansart Museum, furnished rooms, weapons and portraits. Saint-Simon, who knew Sagonne as a child, criticised the architect's acquisition in his Mémoires.

The castle is privately owned and open to the public from June to September. Visitors can see furnished rooms, weapons, portraits and the Mansart Museum. The west and north sides of the enceinte still stand, along with four towers and parts of the portcullis.

The 17th-century frescoes are among the features visitors can see inside, alongside furnished rooms, weapons and portraits, and the Mansart Museum devoted to the architect. The enceinte once had eight towers and two gateways; four towers remain, and the west and north sides still stand.