my non-catholic brother asked me to think about the early church and how it dealt with other apostolic sees.
I suspect he may be trying to make the point that the seats of other apostles either carry as much weight as the chair of Peter or they carry none at all.
Anyway I tried some quick reading on the Arian heresy and just skimming the articles it almost seems like the Pope played very little role in settling the debate over Arianism.
I don’t think that’s quite accurate.
This article explains some of the evidence for the pope’s influence at the Council of Nicea. Among other things, there is evidence that Pope St. Dionysius’s
Letter on the Trinity Against Sebellius was used at the Council as a significant precursor to its own definition of faith. This may have started the tradition by which later ecumenical councils read papal letters out loud as definitive condemnations of heresy, and saluted them afterwards.
We do not
know that the above-linked papal letter was read at the First Ecumenical Council, because the Acts of the Council have not been preserved or rediscovered yet. But St. Athanasius, who was at the Council, placed significant weight on the pope’s letter in his summary of the decrees of the First Ecumenical Council (
De Decretis Nicaenae Synodi Chapter 6) as well as in
De Synodis Part 3 Paragraph 45, where he stresses that the Roman bishop first made use of the word “coessential” (Homoousious) to condemn the ideas of Arius, a century before the First Ecumenical Council.
There is also evidence that the papal legates presided over the council in the pope’s name. For example, it appears that the first three people to sign the Council’s definition of faith were the papal legates, Hosius, Vito, and Vincentius.
Are there any heresies where the pope played a considerable role in settling? Are there any heresies or disputes between the Chair of Peter and, say, another Apostolic See?
Before Arius, the error of Sebellianism held that Jesus and the Father were one person. The third-century pope St. Dionysius wrote
a letter (linked earlier, and here) which seems to have been instrumental in condemning that heresy. Sebellianism was not defended by any of the 5 Patriarchs, not to my knowledge.
Before Sebellianism, the second-century pope St. Victor excommunicated the heretic Theodotus for saying that Jesus was only a man and not God. Again, he was not one of the 5 Partiarchs, but he was another precursor of Arius’s ideas, except that Arius said that Jesus wasn’t merely human, but was a superior creature, similar to an angel, but higher – and still not God. You can read about Pope Victor’s excommunication of Theodotus in Eusebius’
Church History Book 5 Chapter 28 Paragraph 6.
There are examples of popes fighting heresies that were held by some of the 5 Patriarchs, though. Nestorianism was a heresy first stated by the Archbishop of Constantinople, and the pope wrote
a letter ordering him to recant his heresy or St. Cyril will depose him from the see of Constantionple in the name of the pope. St. Cyril then wrote to Nestorius: “[If] your holiness * have not a mind to [accept] the limits defined in the writings of [Pope] Celestine, Bishop of the Church of Rome, be well assured then that you have no lot with us, nor place or standing among the priests and bishops of God.”
source
I love that example because both of those letters were read into the Acts of the Council of Ephesus, and the Council applauded them. I think this shows that the Council accepted the right of the pope to depose another Patriarch. The Council also relied on the pope’s writings for the confirmation of the faith: “The Apostolic and holy see of the most holy bishop Celestine, has previously given a decision and type in this matter, through the writings which were sent to the most God-beloved bishops… This we have also followed and…we carried into effect the type, having pronounced against [Nestorius] a canonical and judgment.”
source
“Compelled…by the canons and by the letter of our most holy father and fellow-servant Celestine, the Roman bishop, we have come, with many tears, to this sorrowful sentence against [Nestorius], namely, that our Lord Jesus Christ, whom he has blasphemed, decrees by the holy Synod that Nestorius be excluded from the episcopal dignity, and from all priestly communion.”
source
When the pope’s letter was read at the Council, the bishops cried out: “This is a just judgment. To Celestine, a new Paul! To Cyril a new Paul! To Celestine the guardian of the faith! To Celestine of one mind with the synod! To Celestine the whole Synod offers its thanks! One Celestine! One Cyril! One faith of the Synod! One faith of the world!”
source
Cont’d next post.*