At first the monk was, as his names implies, a hermit--eremites--one who lived alone in the desert in the practice of evangelical perfection. Such were St. Paul, St. Anthony, Serapion, and thousands of others who imitated their example and lived in solitary cells or rocky caves in Syria, Armenia, and Nitria on the western shores of the Nile some thirty miles from Cairo. Pachomius seems to have been the first who formed these solitaries into a community following one rule and recognising a common superior. He founded his monastery at Tabenna, on the Nile, in Lower Egypt. His sister is said to have been the first who founded a convent of nuns not far from her brother's monastery, in order that she might have the benefit of his advice and direction. The exact date cannot be ascertained; but as he died rather young, about the year A.D. 349, it cannot have been much earlier than A.D. 340. St. Anthony had indeed already undertaken the guidance of certain solitaries, who had placed themselves under his direction. But it was Pachomius who really changed the monasteries, or rather the laura, into a 'convent,' in which all the members of the community dwelt within the same building,[109] were subject to the same rule, and obedient to the same Superior. This change, however, as might be expected, was not accomplished at once; it was rather very gradual, and grew out of the necessities of the time. The laura, which was a group or village of monastic cells, surrounding the oratory and cell of the abbot, under whose direction the monks assembled for their common devotions in the church and sometimes for their common meals in the refectory, was the intermediate stage of monastic development, and it continued to be, both in Egypt and in Ireland, for many centuries the prevalent form of monastic life. From Egypt and Syria monasticism was brought to Rome about the middle of the fourth century by Athanasius, the great champion of the Divinity of Christ, by Honoratus, who founded the island monastery of Lerins, and by John Cassian, whose Institutes were a kind of manual in all the earlier monasteries of the West.