Their excommunication at the council of Vienne, in 1311, in no wise disconcerted them. The long-forgotten doctrines of Arnold of Brescia were revived and intensified. Poverty was an absolute necessity to true Christianity; the holding of property was a heresy, and the Roman church was consequently heretic. Rome, indeed, was openly denounced as the modern Babylon. While thus carrying out to its necessary consequences the sanctification of poverty, which was the essence of Franciscanism, they were equally logical with regard to the doctrines of ascetic purity which had been so earnestly enforced by the church. Their admiration of virginity thus trenched closely on Manichæism, and in combating their errors the church was scarcely able to avoid condemning both the vow of poverty and that of celibacy, which were the corner-stones of the monastic theory.[931] Active persecution, of course, aroused equally active resistance. The Fraticelli espoused the cause of the Emperor Louis of Bavaria, in his long and disastrous quarrel with John XXII., whom they did not hesitate to excommunicate. Exterminated after a prolonged and desperate struggle, their memory was blackened with the slanders disseminated by a priesthood incapable of emulating their ascetic virtues; and principal among these slanders was the accusation which we find repeated on all occasions when an adversary is to be rendered odious—that of promiscuous and brutal licentiousness. No authentic facts, however, can be found to substantiate it.[932] The Fraticelli form a connecting link in the generations of heresy. Their errors, as taught by one of their most noted leaders, Walter Lolhard, who was burned at Cologne in 1322, had a tinge of the Manichæism of the Albigenses, for Satan was to them an object of compassion and veneration.[933] Their prevalence in Bohemia prepared the ground for Huss, and left deep traces in the popular mind which were not eradicated in the eighteenth century; while their proselytes in England served to swell the party of Wickliffe, and eventually gave to it their name, though their peculiar doctrines bore little resemblance to his.[934] Antisacerdotalism, however, was the common tie, and in this Luther, Zwingli, and Knox were the legitimate successors of Dolcino and Michael di Cesena.