Innocent’s mandate probably found Piero at the convent of San Giovanni in Canali at Piacenza, of which he was prior in 1250, and where his austerities so impressed his brethren that they begged his friend, Matteo da Correggio, pretor of the city, to induce him to moderate them, lest the flesh which he so persistently macerated should give way under the ardent spirit within. If, in fact, we are to believe the statement that he habitually never broke his fast before sunset, and that he passed most of the night in prayer, restricting his sleep to the least that was compatible with life, his career becomes easily intelligible. Deficiency of nourishment, replaced by unceasing and unnatural nervous exaltation, must have rendered him virtually an irresponsible being.[237]

We have no details of what he accomplished as inquisitor at Cremona, or at Milan to which he was afterwards transferred. It is presumable, however, that his relentless activity fully responded to the expectations of those who had selected him as the fittest instrument to take advantage, in the headquarters of heresy, of the unexpected opportunity to visit the now defenceless heretics with the wrath of God. Within nine months after he had been summoned to action he had already become such an object of terror that in despair a plot was laid for his assassination. The matter was intrusted to Stefano Confaloniero, a noble of Aliate, and the hire of the assassins, twenty-five lire, was furnished by Guidotto Sachella. The week before Easter (March 23-30), 1252, Stefano proposed the murder to Manfredo Clitoro of Giussano, who agreed to do it, and associated with him Carino da Balsamo. At the same time Giacopo della Chiusa undertook to go to Pavia to slay Rainerio Saccone, and made the journey, but failed to accomplish his mission. The other conspirators were more successful. Frà Piero at that time was Prior of Como, and went thither to pass his Easter. He was obliged to return to Milan on Low Sunday, April 7, as on that day expired the term of fifteen days which he had assigned to a contumacious heretic. During Easter week Stefano, with Manfredo and Carino, went to Como and awaited Piero’s departure. It shows the fearlessness and the austerity of the man that he set out on foot, April 7, though weakened with a quartain fever, and accompanied only by a single friar, Domenico. Manfredo and Carino followed them as far as Barlassina, and set upon them in a lonely spot. Carino acted as executioner, laying open Piero’s head with a single blow, mortally wounding Domenico, and then, finding that Piero still breathed, plunging a dagger in his breast. Some passing travellers carried the body of the martyr to the convent of San Sempliciano, while Domenico was conveyed to Meda, where he died five days afterwards. As for the conspirators, I have already alluded to the strange delay which postponed for forty-three years the final sentence of Stefano Confaloniero, and to the repentance and beatification of Carino, who became St. Acerinus. Daniele da Giussano, another of the confederates, also repented and entered the Dominican Order. Giacopo della Chiusa seems to have escaped, and Manfredo and a certain Tommaso were captured and confessed. Manfredo admitted that he had been concerned in the murder of two other inquisitors, Frà Pier di Bracciano and Frà Catalano, both Franciscans, at Ombraida in Lombardy. He was simply ordered to present himself to the pope for judgment, but in place of obeying he very naturally fled, and there is no record of his subsequent fate. No one seems to have been put to death, and common report asserted that the assassins found a safe refuge among the Waldenses of the Alpine valleys, which is not improbable.[238]

In fact, the Church made much shrewder use of the martyrdom than the exaction of vulgar vengeance. Its whole machinery was set to work at once to impress the populations with the sanctity of the martyr. Miracles multiplied around him. When the General Chapter of the Order assembled at Bologna in May, Innocent wrote to them in terms of the most extravagant hyperbole respecting him, and urged them to fresh exertions in the cause of Christ. By August 31, he ordered the commencement of proceedings of canonization, and before a year had elapsed, March 25, 1253, the bull of canonization was issued—I believe the most speedy creation of a saint on record. It would be difficult to exaggerate the cult which developed itself around the martyr. Before the century was out, Giacopo di Voragine compared his martyrdom with that of Christ, establishing many similitudes between them, and he assures us that the disappearance of heresy in the Milanese was owing to the merits of the saint—indeed, already, in the bull of canonization it is asserted that many heretics had been converted by his death and miracles. It is true that when, in 1291, Frà Tommaso d’Aversa, a Dominican of Naples, in a sermon on the feast of San Piero dared to compare his wounds with the stigmata of St. Francis—saying that the former were the signs of the living God and not of the dead, while the latter were those of the dead God and not of the living—it is true that the expression was thought to savor of blasphemy. The existing pope, Nicholas IV., chanced to be a Franciscan, so Tommaso was summoned before him, forced to confess, and was sent back to his provincial with orders to subject him to a punishment that would prevent a repetition of the sacrilege. Yet successive popes encouraged the cult of San Piero until Sixtus V., in 1586, designated him as the second head of the Inquisition after St. Dominic, and as its first martyr, and in 1588 granted plenary indulgence to all who should visit for devotion the Dominican churches on the days of St. Dominic, Peter Martyr, and Catharine of Siena. In the seventeenth century an enthusiastic Spaniard declared that he was crowned with three crowns, “como Emperador de Martyres.” In 1373, Gregory XI. granted permission to erect a small oratory on the spot of the murder, which grew to be a magnificent church with a splendid convent, through the offerings of the innumerable pilgrims who flocked thither. The authenticity of the martyr’s sanctity was proved when, in 1340, eighty-seven years after death, the body was translated to a tomb of marvellous workmanship, and was found in a perfect state of preservation; and when the sepulchre was opened in 1736 it was still found uncorrupted, with wounds corresponding exactly to those described in the annals.[239]

The enthusiasm excited by the career of San Piero was turned to practical account by the organization in most of the Italian cities of Crocesegnati, composed of the principal cavaliers, who swore to defend and assist the inquisitors at peril of their lives, and to devote person and property to the extermination of heretics, for which service they received plenary remission of all their sins. These associations were wont to assemble on the feast of San Piero in the Dominican churches, which were the seats of the Inquisition, and hold aloft their drawn swords during the reading of the Gospel, in testimony of their readiness to crush heresy with force. They continued to exist until the last century, and Frà Pier-Tommaso Campana, who was inquisitor at Crema, relates with pride how, in 1738, he presided over such a ceremony in Milan. The Crocesegnati, moreover, furnished material support to the inquisitors, supplying them when necessary with both men and money for the performance of their functions. In fact, they were subject to excommunication if they refused to give money when called upon by the inquisitor. It can readily be conceived how greatly the effectiveness of the Inquisition was increased by such an organization.[240]

If the heretics had hoped to strike their persecutors with terror they were short-sighted. The fanaticism of the Order of Dominic furnished an unfailing supply of men eager for the crown of martyrdom and unsparing in their efforts to earn it. Hardly were the splendid obsequies of San Piero completed when his place was occupied by Guido da Sesto and Rainerio Saccone da Vicenza. The latter had been high in the Catharan Church, when, divinely illuminated as to his errors, he was converted and expiated his past life by entering the strict Dominican Order. It was possibly in his favor that in 1246 Innocent IV. authorized the Dominican prior at Milan to admit repentant heretics into the Order without requiring the year’s novitiate that was imposed on Catholics. Thoroughly acquainted with all the secrets of heresy, he could render invaluable aid in persecuting his old associates, whom he pursued with all the ruthless bigotry of an apostate. He was speedily made an inquisitor, and earned an enviable reputation among the faithful by his vigor and success in exterminating heresy. The fact that, as we have seen, he was singled out with San Piero by the conspirators to be slain shows how thoroughly he had earned the hate of the persecuted. We know nothing of the details of the attempt upon his life save that Giacopo della Chiusa returned from Pavia with his errand unaccomplished. Rainerio was at once transferred to Milan as the man best fitted to replace the martyr, and he justified the selection by the unbending firmness with which he vindicated the authority of his office. It was still a novelty in Lombardy, and a man of his keen intelligence, strength of purpose, and self-devotion was required to organize it and establish it among a recalcitrant population.[241]

Heretics, in fact, were more numerous than ever in Lombardy, for the active work carried on in Languedoc by Bernard de Caux and his colleagues had caused a wholesale emigration. Until the death of Frederic, Lombardy was regarded as a secure haven; colonies established themselves there, and even after the Lombard Inquisition was thoroughly organized the persecuted wretches continued for half a century to seek refuge there, nor do we often hear of their being detected.[242] All of Rainerio’s resolution and energy were required for the work before him. In the March of Treviso, Ezzelin da Romano, whose influence extended far to the west, continued openly to protect heresy, and even in Lombardy the hopes excited by Frederic’s death threatened to prove fallacious. In 1253, when Conrad IV. passed through Treviso to recover possession of his Sicilian kingdom, he appointed as his Lombard vicar-general Uberto Pallavicino, who soon became as obnoxious to the Church as Ezzelin himself; and, though Conrad died in 1254, and Innocent IV. seized Naples as a forfeited fief of the Church, Pallavicino’s power continued to increase, and he soon established relations with Manfred, Frederic’s illegitimate son, who wrested Naples from the papacy and became the chief of the Ghibelline faction. Even more threatening was the revulsion of feeling in Milan itself, when its ardent Guelfism was changed to indifference by Innocent’s indiscreet assertion of certain ecclesiastical immunities which touched the pride of the citizens. The heads of the hydra might well seem indestructible.

One of Rainerio’s first enterprises, in 1253, was summoning Egidio, Count of Cortenuova, before his tribunal, as a fautor and defender of heresy. The castle of Cortenuova, near Bergamo, had been razed as a nest of heretics, and its reconstruction prohibited, but the count had seized the castle of Mongano, which was claimed by the Bishop of Cremona, and had converted it into a den of heretics, who enjoyed immunity under his protection. He disdained to obey the citation and was duly excommunicated. He paid no attention to this, and on March 23, 1254, Innocent IV. ordered the authorities of Milan, under pain of ecclesiastical censures, to take the castle by force and deliver its inmates to the inquisitors for trial. The count, however, was in close alliance with Pallavicino, “that enemy of God and the Church,” and the Milanese appear to have had no appetite for the enterprise at the time. Mongano continued to be a place of refuge for the persecuted until 1269, when the Milanese were at last stimulated to undertake the siege, and on capturing it handed it over to the Dominicans.[243]

Better success awaited Rainerio’s efforts with Roberto Patta da Giussano, a Milanese noble who for twenty years had been one of the most conspicuous defenders of heresy in Lombardy. At his castle of Gatta he publicly maintained heretic bishops, allowing them to build houses, and establish schools whence they spread their pernicious doctrines through the land. They had also there a cemetery where, among others, were buried their bishops, Nazario and Desiderio. The place was notorious, and it is related of San Piero-Martire, as an instance of his prophetic gifts, that once when passing it he had foretold its destruction and the exhumation of the heretic bones. Roberto had been cited by the archbishop and had abjured heresy, but no effective measures had been ventured upon to coerce him from his evil ways, and the heretics of Gatta had continued to enjoy his protection. It was otherwise when, in 1254, Rainerio and Guido summoned him again. On his failing to appear they summarily condemned him as a heretic, declared his property confiscated and his descendants subject to the usual disabilities. Roberto saw that the new officials were not to be trifled with. The prospects of the Ghibellines at the moment were apparently hopeless. He hastened to make his peace, binding himself to submit to any terms which the pope might dictate; and Innocent doubtless deemed himself merciful when, August 19, 1254, he ordered the castle of Gatta and all the heretic houses to be destroyed by fire, the bones in the cemetery to be dug up and burned, and the count to perform such salutary penance as Rainerio might prescribe.[244]

The papal power was now at its height. Conrad IV. had died May 20, 1254, not without suspicion of poison; Innocent IV. had seized his Sicilian kingdoms, and for a brief space, until Manfred’s romantic adventures and victory of Foggia, he might well imagine himself on the eve of becoming the undisputed temporal as well as spiritual head of Italy. Every effort was made to perfect the Inquisition and to render it efficient both as a political instrument and as a means of bringing about the long-desired uniformity of belief. On March 8 Innocent had taken an important step in its organization by ordering the Franciscan Minister of Rome to appoint friars of his Order as inquisitors in all the provinces south of Lombardy. On May 20 he reissued his bull Ad extirpanda; on the 22d he sent the constitutions of Frederic II. to all the Italian rulers, with orders to incorporate them in the local statutes, and informed them that the Mendicants were instructed to coerce them in case of disobedience. On the 29th he proceeded to reorganize the Lombard Inquisition by instructing the provincial to appoint four inquisitors whose power should extend from Bologna and Ferrara to Genoa. Under this impulsion and the restless energy of Rainerio no time was lost in extending the institution in every direction save where Ghibelline potentates such as Ezzelin and Uberto prevented its introduction. We chance to have an illustration of the process in the records of the little republic of Asti, on the confines of Savoy. It is recited that in 1254 two inquisitors, Frà Giovanni da Torino and Frà Paulo da Milano, with their associates, appeared before the council of the republic and announced to them that the pope enjoined them to admit the Inquisition within their territories. Thereupon the Astigiani made answer that they were ready to obey the pontiff, but they had no laws providing for persecution and it would be necessary to frame one. Accordingly an ordenamento was drawn up prescribing obedience to the constitutions of Innocent IV. and Frederic II., and it was forthwith added to the local statutes. Similar action was doubtless taking place in every quarter where the people had thus far remained in ignorance of the new doctrine that the suppression of heresy was the first duty of the government.[245]

The death of Innocent IV., December 7, 1254, whether it was the result of Dominican litanies or of mortification at Manfred’s success, made no difference in the energy with which the progress of the Inquisition was pushed. The accession of Alexander IV. was signalized by a succession of bulls repeating and enforcing the regulations of his predecessor, and urging prelates and inquisitors to increased activity. To overcome the resistance of such cities as were slack in the duty of capturing and delivering all who were designated for arrest by the inquisitors, the latter were empowered to punish such delinquency with the heavy fine of two hundred silver marks. Under this impulsion Rainerio assembled the people of Milan, August 1, 1255, in the Piazza del Duomo, read to them his commission, and gave them notice that, although he had hitherto acted with great mildness, the time had passed for trifling. Many citizens, he said, openly derided the Inquisition in the public streets; others caused scandal by opposing and molesting it. He therefore gave three formal warnings, attested by a notarial instrument duly witnessed, that all who should continue to indulge in detraction or should in any way impede the Inquisition were excommunicate as fautors of heresy, and would be prosecuted to such penalties as their audacity deserved.[246]