I already said it took several hundred years for Rome to gain power over the Church. The Oriental churches would split at a time when the Pope of Rome and the Roman church was already considered the leading authority. Thus it was a split from the Roman Church. Around the 5th century.
So, by 1054, Rome was most certainly ruling over the Church.
But Roman Christianity never had power over the whole of Christendom. It was an association of separate bishoprics which occasionally agreed to conferences (councils) intended to resolve any doctrinal disputes. And long before 1054 that unity had been fractured. Also, the Oriental Orthodox, contrary to your view, did not split from Rome but from all the rest of Christianity, much of which was yet to have to deal with claims from the bishop of Rome to literal jurisdiction over
all the Christians of the world.
And the Eastern Orthodox didn't split in the 5th century from Rome which begs, why not? The great schism of 1054 occurred. How is there a schism.?
You just identified one of several other splits that took place prior to 1054 and were never resolved.
It's only a schism if both saw themselves under the same authority.
The "authority" was NOT that of a monolithic organization ruled over by a religious monarch.
Rather, Christianity was diversified in administration under various regional bishops, all of whom were seen as successors of the Apostles and united in faith. This is often referred to as "the undivided church." It was the pretentions to universal jurisdiction on the part of the bishop of Rome (along with his doctrinal changes) which provoked the Schism of 1054.
When the Eastern Patriarch excommunicated the Roman Pope, what was he excommunicating him from?
Strictly speaking, it's the sacraments. Of course, that couldn't be enforced, but the point was to mark him as a rebel from the true faith in need of repentance. He was deemed to be heterodox and unfit for his office.
The Church had become entirely Roman by this time.
Obviously not...as we have just been describing it. You may, in your personal view, take the side of the Roman Catholic Church and say that it alone is true Christianity, but the claim that the actual situation was of a worldwide, united church organization headquartered in Rome is obviously incorrect.
And don't forget that all the other parts, all the other members and parishes and bishoprics we've discussed think that
they are they orthodox Christians and it's Rome that went astray, broke unity, etc. etc.!
The same would be later played out in the 16th century at the Reformation. There were no Lutheran, or Baptist, or Presbyterian churches at that time. Just priests and members of the Roman Catholic Church who disagreed with Rome.
Well, this is different for the reason you just explained.
All
those reformed movements, with the exception of the Church in England, were new and were reforming the Roman Catholic part of worldwide Christianity. For the most part, the reformers had little working familiarity with the Oriental Orthodox or the Eastern Orthodox churches. But those did constitute significant segments of Christianity that were older than the Roman Catholic Church. It's just that they didn't have any presence where Luther, Zwingli, and Calvin lived and worked, so naturally it was the RCC and its particular doctrinal errors that that these men had to contend with.
My point being, the Church at the beginning was not Roman Catholic.
That's right.
but over time, it became Roman Catholic as Rome got power over the Church.
That's wrong.
Rome was not a 'denomination'.
Yes, it was...and is. There's nothing wrong with the term, even if Roman Catholic clergy and publications demand that everyone else use words that imply, wrongly, that all the other Christian churches of the world split off from them in particular, which is untrue. In fact, there isn't another term that would be more accurate.
Meanwhile, the same RCC spokesmen like to use words and terms for Protestant denominations that imply that these aren't even Christian churches!
"Ecclesial communities" is their favorite, as though a Protestant church is at best just someone's unofficial Bible Study group.