Upon the election of Otho as Emperor, in 1208, Germany and Rome were at peace, and Pope Innocent III. found himself at liberty to devote some attention to affairs in Southern France. He had already made some efforts to oppose the growth of heresy: his first emissaries were unable to produce the least effect and in 1208 he had sent Arnaut of Citeaux and two Cistercian monks into Southern France with full powers to act. Their efforts proved fruitless, because Philippe Auguste was no less indifferent than the provincial lords, who actually favoured the heretics in many cases; the Roman Catholic bishops also were jealous of the pope's legates and refused to support them. Not only the laity but many of the clergy had been seduced: the heretics had translated large portions of scripture (translations which still remain to us) and constantly appealed to the scriptures in opposition to the canon laws and the immorality of Rome. They had a full parochial and diocesan organisation and were in regular communication with the heretics of other countries. It was clear that the authority of Southern France was doomed, unless some vigorous steps to assert her authority were speedily taken. "Ita per omnes terras multiplicati sunt ut grande periculum patiatur ecclesia Dei." [27] The efforts of St Dominic were followed by the murder of the papal legate, Pierre de Castelnau, in 1208, which created an excitement comparable with that aroused by the murder of Thomas à Becket, thirty-eight years before, and gave Innocent III. his opportunity. In the summer of 1209 a great army of crusaders assembled at Lyons, and Southern France was invaded by a horde composed partly of religious fanatics, of men who were anxious to gain the indulgences awarded to crusaders without the danger of a journey overseas, and of men who were simply bent on plunder. The last stage in the development of the crusade movement was thereby reached: originally begun to recover the Holy Sepulchre, it had been extended to other countries against the avowed enemies of Christianity. Now the movement was to be turned against erring members of the Christian Church and in the terms of a metaphor much abused at that period, the Crusader was not only to destroy the wolf, but to drive the vagrant sheep back into the fold.[28] Beziers and Carcassonne were captured with massacre; Toulouse was spared upon the humiliating submission of Raimon VI., and little organised opposition was offered to the crusading forces under Simon de Montfort. The following years saw the revolt of Toulouse and the excommunication of Raimon VI. (1211), the battle of Muret in which Raimon was defeated and his supporter Pedro of Aragon, was killed (1213), the Lateran Council (1215), the siege of Toulouse and the death of Simon de Montfort (1218). The foundation of the Dominican order and of the Inquisition marked the close of the struggle.
Folquet of Marseilles is a troubadour whose life belongs to these years of turmoil. He was the son of a Genoese merchant by name Anfos, who apparently settled in Marseilles for business reasons: Genoa was in close commercial relations with the South of France during the twelfth century, as is attested by treaties concluded with Marseilles in 1138 and with Raimon of Toulouse in 1174. Folquet (or Fulco in Latin form) seems to have carried on his father's business and to have amused his leisure hours by poetical composition. The Monk of Montandon refers to him as a merchant in his sirventes upon other troubadours. He is placed in Paradise by Dante and is the only troubadour who there appears, no doubt because of his services to the Church. His earliest poems, written after 1180, were composed in honour of Azalais, the lady whose favour was sought by Peire Vidal, and to whom Folquet refers by the senhal of Aimant (magnet). His poems are ingenious dissertations upon love and we catch little trace of real feeling in them. The stories of the jealousy of Azalais' sister which drove Folquet to leave Marseilles are probably apocryphal. Folquet also addressed poems to the wife of the Count of Montpelier, the daughter of the Emperor of Constantinople. He wrote a fine planh on the death of Barral of Marseilles in 1192 and it was about this time that he resolved to enter the church. His last poem belongs to the year 1195. No doubt the wealth which he may have brought to the Church as a successful merchant contributed to his advancement, but Folquet was also an indomitably energetic character.
Unlike so many of his fellow poets, who retired to monasteries and there lived out their lives in seclusion, Folquet displayed special talents or special enthusiasm for the order which he joined. Of the Cistercian abbey of Toronet in the diocese of Fréjus he became abbot, and in 1205 was made Bishop of Toulouse. He then, in company with St Dominic, becomes one of the great figures of the Albigeois crusade: in 1209 he was acting with Simon de Montfort against Raimon VI., the son of his old patron and benefactor, and persuaded the count to surrender the citadel of Toulouse to de Montfort and the papal legate. He travelled in Northern France in order to stir up enthusiasm for the crusade. The legend is related that, hearing one of his love songs sung by a minstrel at Paris, he imposed penance upon himself. He helped to establish the Inquisition in Languedoc, and at the Lateran council of 1215 was the most violent opponent of Count Raimon. To enter into his history in detail during this period would be to recount a large portion of the somewhat intricate history of the crusade. Of his fanaticism, and of the cruelty with which he waged war upon the heretics, the Count Raimon Roger of Foix speaks at the Lateran council, when defending himself against the accusation of heresy.
E die vos de l'avesque, que tant n'es afortitz,
qu'en la sua semblansa es Dieus e nos trazitz,
que ab cansos messongeiras e ab motz coladitz,
dont totz horn es perdutz qui·ls canta ni los ditz,
ez ab sos reproverbis afilatz e forbitz
ez ab los nostres dos, don fo eniotglaritz,
ez ab mala doctrina es tant fort enriquitz