Instead, he devoted considerable time to German mythology, exploring the forests where
Germanic barbarian tribes had battled with Roman legions and which were themselves a constant source of mystery and stimulation.
He raised armies, successfully withstood the attacks of the Lombards, the latest of
the Germanic barbarians to invade Italy, made his authority respected in Italy, Sicily, Gaul, Spain, and North Africa, attempted to curb the abuses in the Church in the Frankish domains, inaugurated the Roman mission to Britain, preached frequently, endeavored to enforce clerical celibacy, prompted monasticism and improved the quality of life in some of the houses which were lapsing from their professed ideals, and was the author of voluminous writings on theology that were long standard in the West.
Although many were begun and drew much of their strength from the descendants of the
Germanic invaders, in the former Roman realms these «
barbarians» had been partly assimilated to the culture into which pre-Christian Roman and Christian elements had entered.