Ancien château des évêques de Bazas

In feudal times, Gans had its own fortified castle. It was destroyed and replaced by the castle of the Bishops in the 18th century. Indeed, the Bishops had made Gans their country and came to stay there. As the castle threatened to ruin, Monseigneur Mongin, bishop of Bazas and member of the French Academy, undertook its reconstruction. The work, generally attributed to the architect Marsaudon, is completed by Amédée de Grégoire de Saint-Sauveur, successor of Monseigneur Mongin. The building was largely destroyed, leaving only the central forebody with three arcatures on each of the two levels.