The diocese of Coutances, embracing the north-western portion of Celtic Gaul, appears to have been the last part of the country that was visited by the light of Christianity; but its historians boast that the tardy approach of the rays of gospel-truth has been more than compensated by their subsequent brilliancy; for that in no other of the Norman dioceses has the sun of revelation blazed with equal splendor, or given birth to fruits of equal excellence. Thus, according to Rouault,[204] as early as the fifth century, and during the whole of the two following, and a portion of the eighth, the Côtentin was so celebrated, by reason of the great number of saints, who were either natives of the country, or had retired thither as to a place of safe retreat, that it was regarded as being honored with the divine favor, beyond any other district in France. No fewer than fifteen holy men, enshrined in the Roman calendar, are said to have resided there at or near the same period; and, while their lustre irradiated the episcopal mitre, its beams extended to the remote fastnesses of the desert of Scycy, near Granville, then celebrated for the sanctity of its hermits. At a time not long subsequent, St. Algeronde and Theodoric, both of them bishops of Coutances, and the martyrs, Leo, Philip, and Gervais, three natives of Carentan, became principal instruments towards the conversion of the heathen Normans. History also records, that it was in the house of St. Clair, one of the protectors of this diocese, that the treaty was finally concluded, in conformity with which, the chief of the infidels was, with his followers, admitted within the pale of the church. The foundation of the see of Coutances is commonly supposed to have taken place about the middle of the fifth century, during the latter years of the papacy of Celestine I. and of the reign of Pharamond, in France. The see lays claim to the proud distinction of having enriched the beatified calendar with the names of at least fifteen of its bishops; of having added one to the list of the successors of St. Peter; of having supplied six cardinals to the holy college; and of having produced an equal number of martyrs. And if to this catalogue, already great, be joined the many anchorites of Scycy and of Nanteuil, who have been promoted to the episcopal dignity, _a whole legend_, to use the words of a pious author, may be filled with the lives and the miracles of the holy men of Coutances.