lower classes, however, revolted against Frankish overlordship in favour of their old paganism as late as the 840s, when the Stellinga rose up against the Saxon leadership, who were allied with the Frankish emperor Lothair I. After the suppression of the Stellinga, in 851 Louis the German brought relics from Rome to Saxony to foster a devotion to the Roman Catholic Church. The Poeta Saxo, in his verse Annales of Charlemagne's reign (written between 888 and 891), laid an emphasis on his conquest of Saxony. He celebrated the Frankish monarch as on par with the Roman emperors and as the bringer of Christian salvation to people. References are made to periodic outbreaks of pagan worship, especially of Freya, among the Saxon peasantry as late as the 12th century. Christian literature In the ninth century, the Saxon nobility became vigorous supporters of monasticism and formed a bulwark of Christianity against the existing Slavic paganism to the east and the Nordic paganism of the Vikings to the north. Much Christian literature was produced in the vernacular Old Saxon, the notable ones being a result of the literary output and wide influence of Saxon monasteries such as Fulda, Corvey and Verden; and the theological controversy between the Augustinian, Gottschalk and Rabanus Maurus. From an early date, Charlemagne and Louis the Pious supported Christian vernacular works in order to evangelise the Saxons more efficiently. The Heliand, a verse epic of the life of Christ in a Germanic setting, and Genesis, another epic retelling of the events of the first book of the Bible, were commissioned in the early ninth century by Louis to disseminate scriptural knowledge to the masses. A council of Tours in 813 and then a synod of Mainz in 848 both declared that homilies ought to be preached in the vernacular. The earliest preserved text in the Saxon language is a baptismal vow from the late eighth or early ninth century; the vernacular was used extensively in an effort to Christianise the lowest castes of Saxon society. See also List of Germanic tribes Notes References Bachrach, Bernard S. Merovingian Military Organisation, 481–751. Minneapolis: University of Minnesota Press, 1971. Goldberg, Eric J. "Popular Revolt, Dynastic Politics, and Aristocratic Factionalism in the Early Middle Ages: The Saxon Stellinga Reconsidered." Speculum, Vol. 70, No. 3. (Jul., 1995), pp. 467–501. Hummer, Hans J. Politics and Power in Early Medieval Europe: Alsace and the Frankish Realm