The exact date of the birth of St. Cuthbert is unknown. As a youth he was admitted into Melrose Abbey, where in the course of fourteen years he became monk and prior. From there he passed another fourteen years in the Convent of Lindisfarne, after which he retired to Farne for nine years. At the end of this period he was persuaded, most unwillingly, by Egrid, King of Northumbria, to become Bishop of Lindisfarne, a See in Bernicia, as Durham County was then called.
But after two years' office he retired to Farne. There died St. Cuthbert on March 20, A.D. 687, in the thirty-ninth year of his monastic life, still undecided as to where he should be buried. However, the remains were reverently preserved in the Church of Lindisfarne, till the monks were compelled to flee, owing to the invasion of the Danes, towards the end of the ninth century. Though in dire dread and confusion, the monks forgot not their sacred trust, but carried the holy remains of St. Cuthbert with them.
They wandered many a weary day throughout the North of England in search of "Dunholme," which Eadner, a monk of their order, declared to them had been divinely revealed to him as the lasting place of rest for the holy and incorruptible body of St. Cuthbert. They seemed to have had great difficulty in locating the whereabouts of Dunholme, for according to tradition they were miraculously delivered from their nomadic life. As they proceeded they heard a woman inquire of another if she had seen her cow, which had gone astray. Much to their joy and relief they heard the reply, "In Dunholme."
Thereupon they climbed to the summit of the "Hill Island," at the base of which they had arrived, as they wished to deposit their corruptible burden on a spot so close to Heaven that it should remain incorruptible, and by its incorruptibility be a fitting foundation on which to build a shrine worthy of their Saint and the God who honoured him.
About 995 their idea was realised by Bishop Ealdhune. He founded a church, built in the style usual then in Italy, of brick or stone with round arches. This style, based directly on Italian models, became prevalent throughout all Western Europe till the eleventh century, and in England was known as Anglo-Saxon. This church was erected over the Saint's resting-place, upon the rock eminence called Dunholme (Hill Island). Later on the Normans changed this into "Duresne," whence Durham. And a representation of a dun cow and two female attendants was placed upon the building. At the same period the See was transferred from Lindisfarne, and, together with the growing fame of the presence of the "incorruptible body" of the Saint, attracted pilgrims, who settled there with their industries. Thus were laid the foundations of the great city. In this wise St. Cuthbert became the patron Saint of Durham, as well as of the North of England and of Southern Scotland.
In 1072 William the Conqueror found it necessary to erect, across the neck of the rock-eminence, the castle, to guard the church and its monastery.
In 1093 Bishop Carileph built a church of Norman structure in place of Ealdhune's Anglo-Saxon church, and changed the Anglo-Saxon establishment of married priests into a Benedictine abbey.
After the Norman Conquest the county became Palatinate, and acquired the independence peculiar to Counties Palatine.