Amalaireus, Fortunatus a friar of Madeloc, was archbishop of Treves in 810. The following year he established again the Christian religion in that part of Saxony which is situated beyond the Elbe. He dedicated the first Church in Hamburg, and went in 813 as an ambassador to Constantinople in order to ratify the peace treaty which Charlemagne had concluded with the emperor Michael Curopalate. He died the following year in his diocese. He wrote a treatise on baptism, which was printed with others under the name of Alcuin. This was in response to a letter in which Charlemagne consulted the metropolitans of his states upon the sacrament. See Hoefer, Nouv. Biog. Generale, s.v.