Which is based on doctrines taught by Tertullian who left the church because the Bishop of Rome rejected his revisionist doctrine.
Eventually Constantine and the council he convinced accepted the teaching of a non member.
However, as it says in his biography his writings were so rhetorical and hard to understand, you could read anything into his doctrines.
That is why they adopted his teachings. Each could then interpret what he wrote, they way they wanted.
The question then is: If the Bishop of Rome rejected his new doctrine, and he knew him better than we do, why should we accept his revisionist doctrine now?
try peepstones