Historically and culturally, the town is in the country of Astarac, a territory in the very hilly south of Gers, with clay soil, which runs along the Plateau de Lannemezan.

Exposed to an altered oceanic climate, it is drained by the Sousson, the Cédon and various other small rivers.

[3] The remains include a 14 m long room, in which are four open arches, two of which are in good condition, all located behind a curtain wall 2 m thick.

Centerpiece of the county possessions of Astarac, the fortress is mentioned in 1244, with Castelnau-Barbarens, Lasseube-Propre, Moncassin and Simorre, in the tribute paid by Count Centulle II and his mother Segnis de Lomagne to the Count of Toulouse for the entire county.

The manor house visible on the Cassini map is now only a quadrangular building partly ruined to the west.