On display in the chancel of Cathédrale Sainte Marie, which is as huge as the nave, are two sets of magnificent works of art: the stained-glass windows by Gascon master Arnaud de Moles (1460-1520), and the enormous choir stalls (113 oak stalls in total, 69 of which are high stalls topped by a Flamboyant canopy featuring 1 500 figures), the culmination of 50 years of labour. The sound of the great organ (17C) by Jean de Joyeuse can be admired during the Claviers d'Été festival in July-August.