ALTFRIED (ALTFRIED). - Bishop of Hildesheim from 851 until his death on 15 August 874. He was a Benedictine monk of Corvey (near Minden in Westphalia) and worked under Louis the German to restore peace in the kingdom and in the Carolingian dynasty. By promoting the foundation of parish abbeys, he personally had one built for the Benedictines at Salgenhastad (perhaps the present-day Osterwieck near Halberstadt) and another for the Benedictine nuns at Essen. In 872 he blessed the new cathedral dedicated to the Virgin Mary in the episcopal see. His tomb is still located in the monastery of Essen.
BIBL.: Acta SS. Augusti, III, Paris 1867, pp. 210-14; G. Allmang, s. V. in DHG. II, cols. 807-808; W. Hoch, s. V. in LThK, I, cols. 316-17.