The pagan Celts and their first contacts with Christianity -- Christianity in Britain to the Anglo-Saxon invasions -- Monastic saints of the British church -- The Christianization of Ireland: St. Patrick -- The flowering of Irish monasticism -- The Christian mission in Scotland: St. Columba -- Irish saints and English kings -- Learning, art, and worship -- Founders of Christian Brittany -- St. Columban and other missionary peregrini -- Irish scholars in European lands -- The Celtic churches incorporated in the western hierarchical Church.