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Quote Originally Posted by Byzantine_Prince
Is the Armenian Church on the same lineage as the Greek and byzantine church?
Basically yes. The Gregorian Apostolic (from Surp [St.] Kirikor = Gregorios) church is an Orthodox one. But they (along with Syriacs, Copts and some others) refused the 451 Khalkedon creed and kept to the "Monophysite" belief.

Quite a number of Armenians are Catholic. Except that they practice the eastern rite in Armenian, they are in full communion with Vatican. Some Armenians are Protestant.
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