In 1254, when St. Louis was returning from his unsuccessful crusade, he paused in Clermont, to replenish his depleted treasury. Ten years later he presented windows to the cathedral, on the occasion of his son Philippe's marriage there to the daughter of Jaime el Conquistador of Aragon. The lights in the Lady chapel show the fleur-de-lis and the donjons of Castile, and are apparently the work of Paris craftsmen, who controlled the vitrine art of the later XIII century. That unskilled local workers set them in place would seem to be indicated by the armature bars which do not follow the contour of the medallions, as was then the custom. In the choir's clearstory are the single figures and grisaille that were in vogue during the next century. Jean Deschamps made the plan of Clermont Cathedral. He may have studied in the north, since certain traits of Picardy appear here, but the spirit of the work is regional. His windows do not fill the entire upper space between the active members. Under Bishop Guy de la Tour he directed the building of the cathedral for almost forty years, till 1287. Perhaps he designed the cathedral of Limoges, in west-central France, since its plan and details closely resemble those of Clermont. Bishop Aymar de Cros, who carried on the works in Auvergne's capital, was another of the schoolmen who were builders of churches; such was his intellect that St. Thomas Aquinas willed to him his manuscripts in the hope that his _Summa_ might be completed. Under Bishop Aubert Aycelin de Montaigu a new master-of-works took charge--Pierre Deschamps (1287-1325), the son probably of Jean who had made the plans. He erected the four westernmost bays of the choir, the transept, and the easternmost bay of the nave in its lower parts. From 1340 to 1359 the master-of-works was Pierre de Cabazat, who added three more bays to the nave, and was employed in those same years in making, with Hugues Morel, the abbey church of La Chaise Dieu in the Forez mountains across the plain from Clermont.[208] An Avignon pope, Clement VI, was the patron who undertook that gaunt granite structure, as full of sorrow as the times that produced it. Clement had been abbot at La Chaise Dieu, so naturally he contributed toward the erection of the cathedral of Auvergne as did his successor at Avignon, Innocent VI (d. 1362), a former bishop of Clermont.