Amid all this ruin and desolation, when the four angels of the Euphrates seem to have been loosed on Gaul, one force was silently at work knitting up the ravelled ends of the rent fabric of civilisation and tending a lamp which burned with the promise of ideals nobler far than those which fed the ancient faith and polity. The Christian bishops were everywhere filling the empty curule chairs in the cities and provinces of Gaul. At the end of the sixth century society lived in the Church and by the Church, and the sees of the archbishops and bishops corresponded to the Roman administrative divisions. All that was best in the old Gallo-Roman aristocracy was drawn into her bosom, for she was the one power making for unity and good government. From one end of the land to the other the bishops visited and corresponded with each other. They alone had communion of ideas, common sentiments and common interests. St. Gregory, bishop of Tours, was the son of a senator; St. Germain of Auxerre was a man of noble lineage, who had already exercised high public functions before he was made a bishop. St. Germain of Autun was ever on the move, now in Brittany, now at Paris, now at Arles, to crush heresy, to threaten a barbarian potentate, or to sear the conscience and, if need were, ban the person of a guilty Christian king. The bishop of Trèves, seeing the horses of some royal Frankish envoys grazing in the wheat-fields of the peasants, threatened to excommunicate them if they spoiled the substance of the poor, and himself drove the horses away. By the end of the sixth century two hundred and thirty-eight monastic institutions had been founded in Gaul, and from the sixth to the eighth century, eighty-three churches were built. The monasteries were so many nurseries of the industry, knowledge and learning which had not perished in the barbarian invasions; so many cities of refuge from violence and rapine, where the few who thirsted after righteousness and burned with charity might find shelter and protection. "Every letter traced on paper," said an old abbot, "is a blow to the devil." The ecclesiastical and monastic schools took the place of the destroyed Roman day-schools, and whatever modicum of learning the Frankish courts could boast of, was due to the monks and nuns of their time; for some at least of these potentates when not absorbed in the gratification of their lusts, their vengeance, greed, or ambition, were possessed by nobler instincts. Brunehaut, nurtured in the more cultured atmosphere of the Visigoth court of Spain, protected commerce and kept the Roman roads[24] in repair, founded monasteries and corresponded with Gregory the Great, who commended to her care the safety of his missionaries passing through her dominions to convert the Angles across the straits.