>>747138
I don't entirely disagree regarding the church councils but…
>Rome held serious power.
When Constantine moved the capitol, the City lost quite a bit of power. Then when it was sacked, it became a battle zone for a couple hundred years (Gothic wars) and the city emptied out. It wasn't until Charlemagne (9th century) that the city itself began to reassert itself as a political force in Europe. That's when trouble started brewing because Byzantium was no longer the undisputed power base.
So tell me now… who's more powerful atm, the current Constantinople patriarch or the Russian patriarch?