no stone quarries near Toulouse, it was transported from the Pyrenees via the Garonne river and was for a long time rare and therefore expensive, considered in Toulouse as a luxury material. However, it is enough to give Toulouse's architecture one of its characteristics: red/white polychromy. Romanesque architecture (11th-12th c.) The Romanesque architecture of Toulouse is largely dominated by the presence of the Basilica of Saint-Sernin, one of the most important churches of its time in Europe, and fortunate enough to keep its Romanesque character virtually intact. Basilica of Saint-Sernin Basilica of Saint-Sernin, part of the Way of Saint James UNESCO World Heritage Site, was also in itself a major place of pilgrimage. It is one of the two largest surviving Romanesque churches in Europe. With more than two hundred relics (including that of Saint Saturnin who gave his name to the church), many of which were donated by Charlemagne to the shrine that preceded the present church, Saint-Sernin is the church with the most relics after Saint Peter of Rome. Conceived from the outset as a gigantic reliquary, the church was mainly built at the end of the 11th century and at the beginning of the 12th century to welcome the crowds of pilgrims, its double-sided aisles and the ambulatory surrounding the apse make it the archetype of the great pilgrimage church, where pilgrims could make the circuit around the church and were able to stop for meditation and prayer at the apsidal chapels of the transept and the radiating chapels of the choir. The church is also particularly noteworthy for the quality of its Romanesque sculptures, including numerous capitals and the historiated tympanum of the Miègeville gate, one of the first of its kind. Gothic architecture (13th c.-early 16th c.) Southern French Gothic: a militant religious architecture At the beginning of the 13th century, the Catholic clergy of the South of France, seeing a growing number of the faithful turning to the Catharism which advocated a more pious austerity, showed the will to correct the defects of the Catholic Church which indulged in luxury. Under the impulse of the bishop of Toulouse, Foulques, an austere and militant architectural style was born with the reconstruction of the Cathedral of Toulouse: the Southern French Gothic. Conceived according to an ideal of poverty and humility to bring the faithful together in a single, vast nave to facilitate preaching, this architectural style