Perhaps you ought to sit down with a lawyer when you read it.
First Vatican Council says, "
Thereby this means that each and every pope that comes is the prince (or head) of the apostles.
Thereby the Roman Pontiff is the head apostle. Apostle (singular)
First Vatican Council says, "
- the apostolic see and the Roman pontiff hold a world-wide primacy, and that
- the Roman pontiff is the successor of blessed Peter,
- the prince of the apostles,
Thereby this means that each and every pope that comes is the prince (or head) of the apostles.
Thereby the Roman Pontiff is the head apostle. Apostle (singular)
"...which must be believed by all faithful Christians, namely that
the apostolic see and the Roman pontiff hold a world-wide primacy, and that
the Roman pontiff is the successor of blessed Peter,
the prince of the apostles,
true vicar of Christ,
head of the whole church and
father and teacher of all christian people.
To him, in blessed Peter, full power has been given by our lord Jesus Christ to
tend,
rule and govern
the universal church."
https://www.papalencyclicals.net/councils/ecum20.htm
I post that because changes in formatting can amount to changes in punctuation, imo.
and a change in punctuation can result in a change in meaning (you may have noticed our "comma" discussion earlier on this thread).
I think the simplest way to talk about all the issues relevant to this discussion is this:
I think both "Eastern Orthodox" and "Catholic" leaders were involved in writing the Nicene Creed.
*if* one is pledging allegiance to a group of leaders, which group of leaders would it be?