Le Bezu is the name of a ruined Cathar castle in the Aude - more properly called Les Templiers. It is sited on a hill top near to the vilage of Le Bezu, in the Commune of St Just & Le Bezu, in the Aude département withing the Languedoc-Roussillon.
In the popular imagination (and books about Rennes-le-Château) Le Bézu is an old Templar fortress, from where the Templars treasure was rescued when they were persecuted by the French King Philip le Bel in 1307. You will find it marked on maps as "Les Templiers".
It is open to the public - a decent walk from the village of Le Bezu. Not much to see. Entrance is free.A chapel has recently been excavated here - rectangular, not round as the Templar fans would have preferred.