Fourth Council of Dvin

The Fourth Council of Dvin was a Church Council held in Dvin the ancient capital city of Armenia in 648. The Council was presided over by Catholicos Nerses III of Ishkhantsi (641-661) and was attended by 17 participating bishops. 
Background.
The Council was called by the Armenian Crown and chief Bishops to address the ongoing schism between the Armenian Apostolic Church, and the western Orthodox and Catholic churches. Of particular concern was the recent schism with the Georgian Church, which had originally sided with Armenia in rejecting the Chalcedon canons but has recently changed sides by supporting Rome and Byzantium. Unsurprisingly a strong case of unification with Georgia was pursued at the Council but was ultimately rejected.
The Council also adopted 12 canons, and strengthened church discipline.