Rome the see, wasn’t listed 1st because Rome is the capital of the empire and where the emperor resided, it’s listed 1st because the Church of Rome is Peter’s see.
Why do all this for Constantinople? When it was Byzantium, it wasn’t an ancient see.
There WERE no patriarchates in the beginning. Prior to Byzantium becomming Constantinople, you know already various ECF’s had to say re: Rome and all the other Churches.
There was an understanding of order, but the Bp of Rome was not limited as the other bishops were.
You skipped over alot of history there.
Prior to Constantinople
- ~250 a.d. "to set sail and to bear letters from schismatic and profane persons to the throne of Peter, and to the chief church whence priestly unity takes its source; and not to consider that these were the Romans whose faith was praised in the preaching of the apostle, to whom faithlessness could have no access**."Cyprian**Epistle 54 newadvent.org/fathers/050654.htm
- ~180 a.d. All must agree with Rome ( Church of Rome) [Irenaeus Bk 3, Ch 3, v 2-3]Chapter 3
- ~107 a.d. Rome (the Church) hold the presidency Ignatius letter to the Church of Rome
- ~80 a.d. Clement of Rome settles sedition among bishops in Corinth Greece