Castle of Aon

The Château d'Aon is a castle located in the commune of Brocas, in the French department of Landes.
Although the exact date of construction is not known, the castle is first mentioned in the inheritance inventory of Pierre II de Castelnau, who died on March 31, 1645, and had it built after purchasing part of the estate from the family of Bordes-Lassalle. This branch of the Castelnau family only took the title of baron of Brocas afterward. On July 18, 1809, the castle became the property of Marie-Claude de Castelnau and her husband, Jean-François-Marie d'Aon, baron of Hontanx, by inheritance. D'Aon took this opportunity to assume the title of baron of Brocas.

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