 Although stripped of many of its treasures by the zealots of the French Revolution, it still holds many splendid artefacts and works of art.The Chapelle de l'Annonciation has, for example, a superb baroque altarpiece and the organ was built by Cavaillé-Coll, famous for having built the organ in the Church of Saint-Sulpice in Paris.The south arm of the transept is lit by 15th-century stained-glass windows and the tomb of Saint-Guillaume is amongst the many tombs and enfeu scattered throughout the building.