The Germanic peoples underwent gradual Christianization in the course of Late Antiquity and the Early Middle Ages. By AD 700, England and the Frankish Empire were officially Christian, and by 1100 Germanic paganism had also ceased to have political influence in Scandinavia.
In the 4th century, the early process of Christianization of the various Germanic people was partly facilitated by the prestige of the Christian Roman Empire among European pagans. Until the decline of the Roman Empire, the Germanic tribes who had migrated there (with the exceptions of the Saxons, Franks, and Lombards, see below) had converted to Christianity. Many of them, notably the Goths and Vandals, adopted Arianism instead of the Trinitarian (a.k.a. Nicene or orthodox) beliefs that were dogmatically defined by the Catholic Church in the Nicene Creed. The gradual rise of Germanic Christianity was, at times, voluntary, particularly among groups associated with the Roman Empire. From the 6th century, Germanic tribes were converted (or re-converted from Arianism) by missionaries of the Catholic Church.