However this may be, the pontiffs of Rome began very early to claim supremacy over all other bishops and patriarchs. This claim of the Roman pontiffs was based on several alleged grounds, the chief of which was that the Church at Rome had been founded by St. Peter himself, the first bishop of that capital, to whom Christ had given the keys of the kingdom of heaven, and had further invested with superlative authority as a teacher and interpreter of the Word by the commission, "Feed my Sheep;… feed my Lambs," thus giving into his charge the entire flock of the Church. This authority and preeminence conferred by the great Head of the Church upon Peter was held to be transmitted to his successor in the holy office.
ADVANTAGE TO THE ROMAN BISHOPS OF THE MISFORTUNES OF THE EMPIRE.—The claims of the Roman bishops were greatly favored from the very first by the spell in which the world was held by the name and prestige of imperial Rome. Thence it had been accustomed to receive its commands in all temporal matters; how very natural, then, that thither it should turn for command and guidance in spiritual affairs. The Roman bishops in thus occupying the geographical and political centre of the world enjoyed a great advantage over all other bishops and patriarchs.
Nor was this advantage lost when misfortune befell the imperial city. Thus the removal by Constantine the Great of the seat of government to the Bosporus (see p. 332), instead of diminishing the power and dignity of the Roman bishops, tended powerfully to promote their claims and authority. In the phrase of Dante, it "gave the Shepherd room." It left the pontiff the foremost personage of Rome.
Again, when the barbarians came, there came another occasion for the Roman bishops to increase their influence, and to raise themselves to a position of absolute supremacy throughout the West. Rome's extremity was their opportunity. Thus it will be recalled how, mainly through the intercession of Leo the Great, the fierce Attila was persuaded to turn back and leave Rome unpillaged; and how, through the intercession of the same pious bishop, the savage Genseric was prevailed upon to spare the lives of the inhabitants of the city at the time of its sack by the Vandals (see pp. 346, 347). So when the emperors, the natural defenders of the capital, were unable to protect it, the unarmed pastor was able, through the awe and reverence inspired by his holy office, to render services that could not but result in bringing increased honor and dignity to the Roman See.
But if the misfortunes of Rome tended to the enhancement of the reputation and influence of the Roman bishops, much more did the final downfall of the capital tend to the same end. Upon the surrender of the sovereignty of the West into the hands of the emperor of the East, the bishops of Rome became the most important persons in Western Europe, and being so far removed from the court at Constantinople, gradually assumed almost imperial powers. They became the arbiters between the barbarian chiefs and the Italians, and to them were referred for decision the disputes arising between cities, states, and kings. It is easy to understand how directly and powerfully these things tended to strengthen the authority and increase the influence of the Roman See.
THE MISSIONS OF ROME.—Again, the early missionary zeal of the church at Rome made her the mother of many churches, all of whom looked up to her with affectionate and grateful loyalty. Thus the Angles and Saxons, won to the faith by the missionaries of Rome, conceived a deep veneration for the Holy See and became her most devoted children. To Rome it was that they made their most frequent pilgrimages, and thither they sent their offering of "St. Peter's penny." And when the Saxons became missionaries to their pagan kinsmen of the continent, they transplanted into the heart of Germany these same feelings of filial attachment and love. Thus was Rome exalted in the eyes of the children of the churches of the West, until Gregory II. (715-731), writing the Eastern emperor, could say that to these peoples the very statue of the founder of the Roman church seemed "a god on earth."
THE ICONOCLASTS.—The dispute about the worship of images, known in church history as the Iconoclastic controversy, which broke out in the eighth century between the Greek churches of the East and the Latin churches of the West, drew after it far-reaching consequences as respects the growing power of the Roman pontiffs.
Even long before the seventh century, the churches both in the East and in the West had become crowded with images or pictures of the apostles, saints, and martyrs, which to the ignorant classes at least were objects of adoration and worship. A strong party opposed to the use of images [Footnote: The so-called images of the Greek Church were not statues, but mosaics, or paintings. The Eastern Church has at no period sanctioned the use of sculptures in worship.] at last arose in the East. These reformers were given the name of Iconoclasts (image-breakers).
Leo the Isaurian, who came to the throne of Constantinople in 717, was a most zealous Iconoclast. The Greek churches of the East having been cleared of images, the emperor resolved to clear also the Latin churches of the West of these symbols. To this end he issued a decree that they should not be used.
The bishop of Rome not only opposed the execution of the edict, but by the ban of excommunication cut off the emperor and all the iconoclastic churches of the East from communion with the true Catholic Church. Though images were permanently restored in the Eastern churches in 842, still by this time other causes of alienation had arisen, and the breach between the two sections of Christendom could not now be closed. The final outcome was the permanent separation, about the middle of the eleventh century, of the churches of the East from those of the West. The former became known as the Greek, Byzantine, or Eastern Church; the latter as the Latin, Roman, or Catholic Church.