By far the most important, as it is the most notorious, instrument devised for the repression of heresy in the Middle Ages was the tribunal of the Inquisition.[5] CHAPTER II WALDENSES AND CATHARI In the year 1108 there appeared in Antwerp a certain eloquent zealot named Tanchelm. Apparently there existed in Antwerp only one priest, and he was living in concubinage. In these circumstances the enthusiast easily obtained a remarkable influence in the city, as he had already done in the surrounding Flanders country. His preaching was anti-sacerdotal, and he maintained the Donatist doctrine concerning the Sacrament. He declared indeed that owing to the degeneracy of the clergy the sacraments had become useless, even harmful, the authority of the Church had vanished. He is also credited with having given himself out to be of divine nature, the equal of Christ, with having celebrated his nuptials with the Virgin Mary, with having been guilty of vile promiscuous excesses, with having made such claims as that the ground on which he trod was holy and that if sick persons drank of water in which he had bathed they would be cured. We need not necessarily take these stories seriously. Our knowledge of Tanchelm and his followers is derived mainly from St. Norbert, Archbishop of Magdeburg and founder of the Praemonstratensian order, who after the leader’s death undertook the task of winning back his followers to the true faith. The evidence comes, as usual in these cases, entirely from hostile sources, and may easily be based on credulous gossip. Certain it does, however, appear to be that the man succeeded in obtaining a remarkable influence, surrounding himself with a bodyguard of 300 men and making himself a power and even a terror throughout the neighbourhood. That he cannot have regarded himself as an apostate is clear from his having paid a visit to Rome in 1112 on the question of the division of the bishopric of Utrecht. On the way back he was, together with his followers, seized by the Archbishop of Cologne. Three of the disciples were burned at Bonn; he himself escaped, to be killed three years later by a clout on the head administered by an avenging priest.[6]