(1) The political organisation of the church attained its complete development, and the result was a structure so stable, homogeneous, and comprehensive that no other association within the empire could vie with it. While the framework of the state grew looser and looser, and the several parts began to exhibit symptoms of falling apart, the edifice of the church grew steadily firmer and stronger. The bishops, as successors of the Apostles, everywhere concentrated the power in their own hands and suppressed all other forms of authority; the church became an episcopal church. But the bishops were not only united among themselves by provincial synods, they kept up an active and intimate correspondence throughout the whole empire by means of letters and emissaries, and even at this time all matters of importance were settled by common consent. If we take the provincial synods as corresponding to the diets of the provinces, the organisation of the church had advanced a step beyond the latter. As early as the second half of the third century synods were held at Rome to which bishops came from every part of Italy, and sixty years before the Council of Nicæa a synod sat at Antioch to which bishops flocked from all the countries between the Halys and the Nile. Thus the episcopal confederation which ruled the Christian communities was a state within a state. The fact could not be hidden from the chiefs of the state. Under Maximinus Thrax the bishops had borne the brunt of persecution; Decius is reported to have said that he could sooner endure a rival emperor in Rome than a Christian bishop; and the persecutions of Gallus, Valerian, Diocletian, Galerius, and Maximinus Daza were directed in the first instance against the bishops. Gallienus and Aurelian addressed letters to the bishops, the former to those of Egypt, the latter to those of Syria, and thus made it plain that they were well aware of the authoritative position of the bishops in the churches.
More than this, Aurelian appreciated the value of the episcopate which had Rome for its centre as a conservative and patriotic element in the state; for when a quarrel was raging at Antioch as to the ecclesiastical party to which the church buildings, and consequently the church property, belonged of right, he ignored the theoretical disqualifications of the church before the law and decided that possession was due to that party which was “in epistolary correspondence with the bishops of Italy and the city of Rome.” That is to say, he was already using the church to reinforce the Roman spirit in the East. But what warrant had he to interfere? Thus much: the disputant parties in the church had themselves applied to him to decide their quarrel. Thus, forty years before the time of Constantine the church had appealed to the emperor to arbitrate in a question of canon law, and the emperor had practically acknowledged the existence of the church and its value as a pillar of imperial authority.
If, in addition to this, we consider that the church already possessed buildings, land, and property in every province of the empire; that the clergy, in the large towns, at least, were very numerous and represented a strictly organised scale of hierarchical degrees; that by their assistance the bishops directed and superintended all the affairs of the communities in even the most trivial details; that each community was likewise an effective organisation for the relief of the poor; and, finally, that in many provinces the country districts were overspread by a close network of provincial bishoprics and parishes, we shall no longer be surprised that even the emperor Alexander regarded the system of church government with envious eyes.
The civil and military system of the empire was falling into decay, the legions were permanent centres of revolution, the generals born pretenders; but the