Rieux Cathedral, which is located here, was the seat of the
Ancien Régime diocese of Rieux, created in 1317 and dissolved in 1790. In 1560, Rieux-Volvestre was the site of the trial of Arnaud du Tilh, in the
Martin Guerre case of imposture. The commune of Rieux was renamed to Rieux-Volvestre in 2009, which is written by a decision. ==Population==