In the early times every church, without prejudice to its agreement with the Church universal in all essential points, managed its own affairs with perfect freedom and independence, maintaining its own traditional usages and discipline, all questions not concerning the whole Church, or of primary importance, being settled on the spot.

Until the beginning of the ninth century, there was no change in the constitution of the Roman Church. But about 845 the Isidorian Decretals were fabricated in the west of Gaul—a forgery containing about one hundred pretended decrees of the early popes, together with certain spurious writings of other church dignitaries and acts of synods. This forgery produced an immense extension of the papal power, it displaced the old system of church government, divesting it of the republican attributes it had possessed, and transforming it into an absolute monarchy. It brought the bishops into subjection to Rome, and made the pontiff the supreme judge of the clergy of the whole Christian world. It prepared the way for the great attempt, subsequently made by Hildebrand, to convert the states of Europe into a theocratic priest-kingdom, with the pope at its head.

Gregory VII., the author of this great attempt, saw that his plans would be best carried out through the agency of synods. He, therefore, restricted the right of holding them to the popes and their legates. To aid in the matter, a new system of church law was devised by Anselm of Lucca, partly from the old Isidorian forgeries, and partly from new inventions. To establish the supremacy of Rome, not only had a new civil and a new canon law to be produced, a new history had also to be invented. This furnished needful instances of the deposition and excommunication of kings, and proved that they had always been subordinate to the popes. The decretal letters of the popes were put on a par with Scripture. At length it came to be received, throughout the West, that the popes had been, from the beginning of Christianity, legislators for the whole Church. As absolute sovereigns in later times cannot endure representative assemblies, so the papacy, when it wished to become absolute, found that the synods of particular national churches must be put an end to, and those only under the immediate control of the pontiff permitted. This, in itself, constituted a great revolution.

Another fiction concocted in Rome in the eighth century led to important consequences. It feigned that the Emperor Constantine, in gratitude for his cure from leprosy, and baptism by Pope Sylvester, had bestowed Italy and the Western provinces on the pope, and that, in token of his subordination, he had served the pope as his groom, and led his horse some distance. This forgery was intended to work on the Frankish kings, to impress them with a correct idea of their inferiority, and to show that, in the territorial concessions they made to the Church, they were not giving but only restoring what rightfully belonged to it.

The most potent instrument of the new papal system was Gratian's Decretum, which was issued about the middle of the twelfth century. It was a mass of fabrications. It made the whole Christian world, through the papacy, the domain of the Italian clergy. It inculcated that it is lawful to constrain men to goodness, to torture and execute heretics, and to confiscate their property; that to kill an excommunicated person is not murder; that the pope, in his unlimited superiority to all law, stands on an equality with the Son of God!

As the new system of centralization developed, maxims, that in the olden times would have been held to be shocking, were boldly avowed—the whole Church is the property of the pope to do with as he will; what is simony in others is not simony in him; he is above all law, and can be called to account by none; whoever disobeys him must be put to death; every baptized man is his subject, and must for life remain so, whether he will or not. Up to the end of the twelfth century, the popes were the vicars of Peter; after Innocent III. they were the vicars of Christ.

But an absolute sovereign has need of revenues, and to this the popes were no exception. The institution of legates was brought in from Hildebrand's time. Sometimes their duty was to visit churches, sometimes they were sent on special business, but always invested with unlimited powers to bring back money over the Alps. And since the pope could not only make laws, but could suspend their operation, a legislation was introduced in view to the purchase of dispensations. Monasteries were exempted from episcopal jurisdiction on payment of a tribute to Rome. The pope had now become "the universal bishop;" he had a concurrent jurisdiction in all the dioceses, and could bring any cases before his own courts. His relation to the bishops was that of an absolute sovereign to his officials. A bishop could resign only by his permission, and sees vacated by resignation lapsed to him. Appeals to him were encouraged in every way for the sake of the dispensations; thousands of processes came before the Curia, bringing a rich harvest to Rome. Often when there were disputing claimants to benefices, the pope would oust them all, and appoint a creature of his own. Often the candidates had to waste years in Rome, and either died there, or carried back a vivid impression of the dominant corruption. Germany suffered more than other countries from these appeals and processes, and hence of all countries was best prepared for the Reformation. During the thirteenth and fourteenth centuries the popes made gigantic strides in the acquisition of power. Instead of recommending their favorites for benefices, now they issued mandates. Their Italian partisans must be rewarded; nothing could be done to satisfy their clamors, but to provide for them in foreign countries. Shoals of contesting claimants died in Rome; and, when death took place in that city, the Pope claimed the right of giving away the benefices. At length it was affirmed that he had the right of disposing of all church-offices without distinction, and that the oath of obedience of a bishop to him implied political as well as ecclesiastical subjection. In countries having a dual government this increased the power of the spiritual element prodigiously.

Rights of every kind were remorselessly overthrown to complete this centralization. In this the mendicant orders were most efficient aids. It was the pope and those orders on one side, the bishops and the parochial clergy on the other. The Roman court had seized the rights of synods, metropolitans, bishops, national churches. Incessantly interfered with by the legates, the bishops lost all desire to discipline their dioceses; incessantly interfered with by the begging monks, the parish priest had become powerless in his own village; his pastoral influence was utterly destroyed by the papal indulgences and absolutions they sold. The money was carried off to Rome.

Pecuniary necessities urged many of the popes to resort to such petty expedients as to require from a prince, a bishop, or a grand-master, who had a cause pending in the court, a present of a golden cup filled with ducats. Such necessities also gave origin to jubilees. Sixtus IV. established whole colleges, and sold the places at three or four hundred ducats. Innocent VIII. pawned the papal tiara. Of Leo X. it was said that he squandered the revenues of three popes, he wasted the savings of his predecessor, he spent his own income, he anticipated that of his successor, he created twenty-one hundred and fifty new offices and sold them; they were considered to be a good investment, as they produced twelve per cent. The interest was extorted from Catholic countries. Nowhere in Europe could capital be so well invested as at Rome. Large sums were raised by the foreclosing of mortgages, and not only by the sale but the resale of offices. Men were promoted, for the purpose of selling their offices again.

Though against the papal theory, which denounced usurious practices, an immense papal banking system had sprung up, in connection with the Curia, and sums at usurious interest were advanced to prelates, place-hunters, and litigants. The papal bankers were privileged; all others were under the ban. The Curia had discovered that it was for their interest to have ecclesiastics all over Europe in their debt. They could make them pliant, and excommunicate them for non-payment of interest. In 1327 it was reckoned that half the Christian world was under excommunication: bishops were excommunicated because they could not meet the extortions of legates; and persons were excommunicated, under various pretenses, to compel them to purchase absolution at an exorbitant price. The ecclesiastical revenues of all Europe were flowing into Rome, a sink of corruption, simony, usury, bribery, extortion. The popes, since 1066, when the great centralizing movement began, had no time to pay attention to the internal affairs of their own special flock in the city of Rome. There were thousands of foreign cases, each bringing in money. "Whenever," says the Bishop Alvaro Pelayo, "I entered the apartments of the Roman court clergy, I found them occupied in counting up the gold-coin, which lay about the rooms in heaps." Every opportunity of extending the jurisdiction of the Curia was welcome. Exemptions were so managed that fresh grants were constantly necessary. Bishops were privileged against cathedral chapters, chapters against their bishops; bishops, convents, and individuals, against the extortions of legates.