But we have already seen that Innocent was not always successful, and that most of his successes were won only after a prolonged contest. Their matrimonial irregularities brought him into conflict with nearly all the Christian Kings of Spain, and the kingdom of Leon was struck by an interdict which was not removed for five years. It was a more serious matter for the future that the papal acts for the first time roused the opposition of the people in more than one instance; while it is right to notice that Innocent often got acknowledgment of his claim to adjudicate by accepting what had already been done. But despite some notable failures, he did meet with considerable success; and since he got so much, it is not surprising that he aimed at more. Perhaps the greatest disappointment of his life was the failure of the Fourth Crusade. Innocent found some compensation in the great victory won by the united chivalry of Spain and France over the Almohades on the field of Las Navas de Tolosa in 1212. But he is responsible for inventing a new kind of crusade--that of Christians against Christians--in the undoubtedly papal duty of dealing with the Albigensian heretics; and it is, in modern eyes at least, a small condonation that he encouraged the founder of the Dominicans and received Francis of Assisi with sympathy. [Sidenote: The Fourth Lateran Council.] Innocent's pontificate ended in a blaze of glory. After the settlement of the strife in Germany he called together a Council which is distinguished as the Fourth Lateran or the Twelfth OEcumenical Council. It met in 1215, and was composed of more than two thousand persons, including envoys from all the chief nations of Europe. Its resolutions were embodied in seventy canons dealing with a vast variety of subjects in the endeavour to bring about a drastic reformation of the Church. This is perhaps Innocent's most solid claim to the name of a great ruler. But it only serves to emphasise the wholly external nature of his rule. And subsequent ages have recognised this limitation to his claims for honour in that, while they have freely accorded to him the name of a great man and a great Pope, if not the greatest of the pontiffs, the Church has never added his name to the rôle of Christian saints. CHAPTER X THE PAPAL POWER IN THE CHURCH [Sidenote: The basis of papal claims.] The interest of the period with which we are dealing is largely concerned with the attempted definition of the relations between Church and State. The peculiar form of mediaeval thought resolved this into a struggle of the papal power to make itself supreme over all temporal rulers. But scarcely less important or interesting is the concomitant effort of the Papacy to gather up into itself the whole immediate authority of the Church.