A succession of cathedrals had stood on the site of Angers' actual church. To that of the IV century, St. Martin, Gaul's apostle, presented relics of St. Maurice and his legion of Theban soldiers. A Merovingian cathedral mentioned by Gregory of Tours was succeeded by a Carolingian basilica, and after the year 1000 the chief church of Angers was rebuilt several times as Romanesque. A dedication occurred in 1030. In 1032 the cathedral was wiped out by a fire caused by that remarkable personage, Fulk Nerra, the Black Falcon, who raised Anjou from an insignificant under-fief to be one of the chief powers in France.[186] To atone for his feudal excesses, Fulk built many shrines and made many pilgrimages; in Palestine, with the same melodramatic instinct for the picturesque which his descendant, Coeur-de-Lion, was to display, he walked barefooted in the streets of Jerusalem, flagellated by his own servitors, as he lamented, "Lord be merciful to a perjured, unfaithful Christian wandering far from his native land." All over Anjou, and in Touraine, Fulk III put up abbey churches and castles; "the great builder," he was called. One day, from his castle on the rock of Angers, his falcon eyes saw a dove fluttering over a certain spot beyond the river, and there he founded the abbey of St. Nicholas in 1020, and his wife at that period (he had a succession of wives, one of whom he is said to have killed) founded a nunnery close by to which was once attached the church of the Trinité. In the XVI century St. Nicholas was called Ronceray, because a bramble-rose insisted on pushing its way up through the choir's pavement.[187] A superman was Fulk the Black, highly dowered intellectually, with enormous capacity for organization, but of shameless wickedness, calculating, subtle, unscrupulous as to the means by which he pursued his designs, and of demoniac temper--marked traits in his race from generation to generation. Vestiges of the cathedral of Angers which rose after the fire of 1032, and in which Urban II preached the First Crusade, are in the actual nave, built by Bishop Ulger[188] (1125-49). He taught in the cathedral school, which school was the nucleus of the present University of Angers. His successor, Bishop Normand de Doué (1149-53), at his own expense, substituted for the timber roof of the new nave its massive Angevin vaults. When we recall that only fifteen years earlier Abbot Suger, who started Gothic architecture on its triumphal career, was building the heavy diagonals to be seen in the antechurch at St. Denis, we can understand what pioneers were the builders of southwest France in the use of the cardinal organ of the new system.