==607-610 Third Council of Dvin==The Third Council of Dvin was a Caucasian Church council held in 607 (or 609-610) in the city of Dvin (then in Sasanian Armenia).  It appoints Abraham I as Catholicoi of the See of Etchmiadzin but opens the door to Sabellian-Modalism, Tritheism and especially Eutychian-Adoptionism (Miaphysitism).  Many Armenian Monophysites Miaphysites are dismayed and become Acephalian Gnostic Baptists at this point instead.