Château de Thibault de Termes, Medieval fortification tower in Termes-d'Armagnac, France.

Château de Thibault de Termes is a square keep of 36 m with walls two metres thick, built of tan and ochre brick and stone. A round turret projects from one side; the facade has small arched openings, a grilled window and a blocked opening. Inside, three vaulted floors each hold a fireplace, served by a circular stone stair, with latrines and connecting galleries. Only a tall wall of the former logis remains, plus a lower building with two walled-up arches.

The castle was built at the end of the 13th and start of the 14th century for Jean, Count of Armagnac, on a hill above the Adour and Arros valleys. It stayed with the Armagnac-Termes family until the French Revolution, when it was sold as a national asset. After the main building was demolished, its stone went into the Port-Sainte-Marie to Riscle railway; the keep was bought by the commune in the 1960s and restored.

The keep now houses a museum of Gascon life, opened in 1985 and redesigned around 2020 to present the late Middle Ages. Its name recalls Thibault d'Armagnac, who fought beside Joan of Arc and testified at her trial. The tower was given to the commune by André Boingnères in the 1960s.

The tower is easily reached on foot from the village with a short climb that rewards with views of the surroundings. Wear comfortable shoes for the visit, especially if you plan to climb the internal stairs.

The keep's square walls are two metres thick, and a circular stone staircase serves its floors, which have communicating galleries and latrines. The castle passed to the Boingnères family; André Boingnères gave the tower to the commune in the 1960s so this heritage could be opened to all, an innovative aim at the time.