Pataria, whence they soon became known as Paterins—a term which for centuries continued to be of fearful import, as synonymous with Manichæans.[506] Matters could not long remain in this condition. During an altercation in the church of San Celso, a hot-headed priest assaulted Arialdo, whom Landolfo extricated from the crowd at considerable personal risk. Thereupon the reformers called the people together in the theatre; inflammatory addresses speedily wrought up the popular passions to ungovernable fury; the priests were turned out of the churches, their houses sacked, their persons maltreated, and they were finally obliged to purchase a suspension of oppression by subscribing a paper binding themselves to chastity. The nobles, far from being able to protect the clergy, finding themselves also in danger, sought safety in flight; while the rabble, having exhausted the support derivable from intramural plunder, spread over the country and repeated in the villages the devastations of priestly property which they had committed in Milan.[507] The suffering clergy applied for relief to the bishops of the province, and finding none, at length appealed to Rome itself. Stephen IX., who then filled the papal chair, authorized the archbishop to hold a synod for the purpose of restoring peace. It met, in the early part of 1058, at Fontaneto, near Novara. The prelates were unanimous in sustaining their clergy, and the reformers Landolfo and Arialdo were excommunicated without a dissentient voice. They disregarded the interdict, however, redoubled their efforts with the people, whom they bound by a solemn oath to adhere to the sacred cause, and even forced the priests to join in the compact. Arialdo then proceeded to Rome, where he developed in full the objects of the movement, and pointed out that it would not only result in restoring purity and discipline, but might also be used to break down the dangerous independence of the Ambrosian church and reduce it to the subjection which it owed and refused to the Apostolic see. The arguments were convincing, the excommunication was removed, and Arialdo returned to his work with zeal more fiery than ever.[508]