The ritual that developed at the patriarchate of Constantinople—known as the Byzantine rite—gradually replaced other local rites in the Orthodox East, and after the 13th cent. became, with local variations and translations, the standard of Orthodox worship.
End quote.
What you say about this?
Also another quote:
The word Orthodox became current at the time of the defeat (753) of iconoclasm in Constantinople. Orthodox acceptance of the seven councils resulted in the exclusion from their communion, on grounds of heresy, of the Nestorian, Jacobite, Coptic, and Armenian churches; it also involves holding a sacramental doctrine of grace ex opere operato (see grace) and of veneration of the Virgin Mary, two points differentiating the Orthodox from Protestants.
Mate, up to the Great Schism (in 1054) was only ONE church!!
Please research!!