While in the Southern provinces the Empire was thus dying from exhaustion, and the little isolated municipal states of the towns remained the only representatives of civil government left in the land, in Northern Gaul the invasions of the barbarians were much more frequent and numerous, so that almost every trace of Roman civilization was obliterated. But in the midst of all this decay and destruction of general government a new organising and centralising power was arising, in the form of the Christian Church. After passing through the fiery trials of the first three centuries Christianity had been adopted by Constantine in A.D. 313; and by the end of the fourth century the church had become an extensive and united institution, with a well organised hierarchy of clergy, revenues of its own, and provincial, national, and general councils. The vigour of the administration of the church system was conspicuous in the general laxity, and the control of affairs naturally fell into the hands of the ecclesiastical authorities--the priests and bishops. Their jurisdiction was officially recognised, and under the codes of Theodosius and Justinian the control of municipal affairs was remitted to the clergy and bishops, who were thus for a time in their respective cities the representatives of government and order. From the date of Constantine till the overthrow of society, Barbarism, Paganism, and Christianity went on side by side. While civilisation remained the schools continued, Christians of antique learning and Pagan students discussed together the same problems of philosophy, and the Fathers endeavoured to reconcile them with Christianity. But as successive waves of Barbarians rushed over the land, drowning all before them, almost every semblance of learning was swept away. Hence arose a desire on the part of learned men to retire from the anarchy and insecurity of the conditions around them to some safe retreat, where they might converse on and study in peace those high problems which occupied their minds. These societies, in the natural course of events, were by degrees converted into monasteries. The celebrity of the Eastern ascetics and devotees had penetrated to Western Europe, but the solitary form of religious observance did not at first meet with much encouragement there. Societies of recluses were then, however, also common in the East, and the Eastern monastery was the form adopted by the Western recluses as their model. But monasteries were not at this time religious societies, nor were the monks in Holy orders. They were simply associations of laymen who wished to retire from the confusion and turmoil into which all civil government was thrown, and find peace for study and quiet for contemplation. Such was the famous monastery of the Lérins, founded early in the fifth century by St Honorat, on an island off the coast near Cannes, which soon became the most celebrated school of learning and piety in Southern Gaul, and was as great a