>> How much influence did Rome have? <<
It’s an ecumenical council; that means it was one of the times when the REST of the church hashed things out among themselves without being dominated by the pope. The only point is that it wasn’t “UNDER” Constantine.
>> Canon VI <<
Oh come on, Reggie. It’s common knowledge that, on matters of customs, discipline, rites, and privileges that each of the ancient patriarchies has maintained independence from Rome to this day, isn’t it? Surely, you know that there are non-Latins in communion with Rome who have their own rites, their own discipline regarding married priests, for instance, etc., etc., no? Surely you are aware that the Pope is the Patriarch of the Latin Rite, but that there is also the Byzantine Rite, the Melchite Rite, etc., no? C
I'm still waiting for the text of the Constantine "invitation".