The cathedral was constructed beginning with an apse at the east end and building west through the choir, between 1282 and 1300. Bernard de Castanet died in 1317. The nave walls were built, topped by channels to carry off rain water, between about 1310 and 1340, followed by then the base of the bell tower built between 1355 and 1366, and the construction of the vaults over the nave. Work on the nave was completed at about 1330.
