The Council of Manzikert (or Manazkert) met in 726 to reconcile the Armenian Apostolic and Syriac Orthodox churches.
[1][2] Both the Armenian church and the Syriac were miaphysite in their theology and rejected the Council of Chalcedon (451).
In the canons of the council, the Armenians anathematized both the aphthartodocetists (who believed that Jesus' body was incorruptible) and some of the more heretical followers of Severus of Antioch (who was himself nonetheless accepted) in favour of the moderate formulation of Cyril of Alexandria.
This formulation was arguably consistent with Chalcedon (if taken in light of the Second Council of Constantinople).
[1] This Council also led to the canonization and re-acceptance of Severus of Antioch for the Armenians.