Ermanrich of Passau

Ermanrich or Ermenrich (Hermanrich; born c. 814 – 874) was a Benedictine monk and court chaplain, who became Bishop of Passau from 866 to 874. He supported East Francia's expansion to the east, and likewise the expansion of the eastern bishoprics, and opposed the missionary efforts of Cyril and Methodius, who he considered intruders. This brought him into conflict with the Papacy, which supported the brother missionaries.