The Roman/Byzantine Emperor wanted a Patriarch in his capital city, hence there was one. The eastern Patriarchs all ran after pretty much every heresy and had to be drawn back over and over again by the Bishop of Rome (usually whenever there was a Catholic Emperor).
The Councils of Nicea and Constantinople I produced the Creed without much (actually, in the second, any) (name removed by moderator)ut from Rome.
Ephesus’ champion was Pope Cyril of Alexandria, another “exception?”
Chalcedon examined Leo’s tome before they accepted it, but they still, despite Leo’s instructions, wrote their own definition.
Patriarch Eutychus held the Fifth Council over Pope Vigilius’ objections, and although the Pope was in town, he did not attempt or take part, and the council struck him from the diptychs.
Sixth Council: Pope Honorius.
The notable exception to this is Athanasius who was Patriarch of Alexandria, and along with the Pope and a few others was one of the only Bishops to not become Arian, when that was what the Ecumenical Councils were voting for without the authority of the Pope. The reason why the Pope didn’t always have authority over the Patriarch of Constantinople is that almost half the time the Patriarch was excommunicated for heresy.
Yes, like St. Gregory Nazianzus, (and St. Meletius in Antioch), St. Nectarios (and St. Flavian) and St. John Chrysostom, Fathers who produced the Creed. At least our Creed.
After each schism the Patriarch would need to sign up to Papal Supremacy to rejoin the Catholic Church. In fact some Patriarchs were removed by the Pope and replaced with others.
This is only claimed once, Pope Agapetus “deposing” Patriarch Anthimus, who had violated the canons by leaving his see. St. Gregory had been removed for the same offense, at the insistence of the Pope of Alexandria.
As for baptism form, sprinkling was always possible though never the primary form. Noone uses the original form now which was naked baptism.
Oh? I’ve been to several, including my two sons.
Also many other practices have changes like Confession, which used to be in front of the whole congregation, only allowed once in your life, only for the most serious sins and followed by years of penance
Only heretics restricted it to once in your life.