Unique vestige of the powerful fortress of the lords of Aner, the 40 metres keep raises at the top of its hill. We are here on the borders of the viscounty of Bearn, of the county of Armagnac and Bigorre, a very strategic place. Gaston de Foix-Bearn, nicknamed Phoebus, put his architect Sicard de Lordat in charge of the rebuilding of the old fortress.
Between 1375 and 1380, the castle raised little by little. They used bricks, because it's a very cheap material. The peak? The keep with its three metres solid walls on 5 storeys, which make its builder very proud: a blazon above the entrance says in all modesty "Phebus made me"! Refuge for the Protestants during war of religion, Montaner was demolished in 1620... except its keep! The tower will be purchase by Pyrénées-Atlantiques département in 1840.