[German Version]

(c. 1006, Lorraine [?] – May 5, 1061, Rome). Humbert, a monk in Moyenmoutier, was called to Rome by Leo IX. In 1050 he became archbishop of Sicily and cardinal of Silva Candida, and in 1054 leader of the Roman delegation to Constantinople; negotiations concerning liturgical questions and an alliance against the Normans failed. Humbert composed a dialogue between a Roman and a Constantinopolitan in responding to the attacks by the Byzantine Patriarch Michael I Kerullarios against liturgical practices …