There are no other Apostolic Sees other than Rome!
“
APOSTOLIC SEE. Title given to Rome since the first Christian centuries. It applies to the Pope and the persons and offices directly under his authority. It implies that, as successor of St. Peter, the Prince of the Apostles, he has the primary duty of extending the Christian faith to all the world.”
Modern Catholic Dictionary by Fr. John A. Hardon, S.J.
therealpresence.org/cgi-bin/getdefinition.pl
Thus the mere claims of other sects, and even of the various separated Orthodox Churches to parity, are hollow against the reality that is Christ’s Church founded on St Peter with His authority and teaching dogma and doctrine infallibly.
Do you still doubt Peter’s authority and the evidence?
Already, Peter had exercised his supreme authority in the upper room before Pentecost to have Judas’ place filled. At the first Apostolic Council of Jerusalem Peter settled the heated discussion over circumcising the gentiles and “the whole assembly fell silent” (Acts 15:7-12). Paul made sure that his ministry to the gentiles was recognised by, Peter (Gal 1:I8).
Peter often spoke for the rest of the Apostles (Mt 19:27; Mk 8:29; Lk 12:41; Jn 6:69). The Apostles are sometimes referred to as “Peter and his companions” (Lk 9:32; Mk 16:7; Acts 2:37). Peter’s name always heads the list of the Apostles (Mt 10:1-4; Mk 3:16-19; Lk 6:14-16; Acts 1:13). Finally, Peter’s name is mentioned 191 times, which is more than all the rest of the Apostles combined (about 130 times).
After Peter, the most frequently mentioned Apostle is John, whose name appears 48 times. Peter is conspicuously involved in all the Church’s important “firsts.” Peter led the meeting which elected the first successor to an Apostle ( Acts 1:13-26). Peter preached the first sermon at Pentecost (Acts 2:14), and received the first converts (Acts 2:4 1). Peter performed the first miracle after Pentecost (Acts 3:6-7), inflicted the first punishment upon Ananias and Saphira (Acts 5:1-11), and excommunicated the first heretic Simon the magician (Acts 8:2 1).
Peter is the first Apostle to raise a person from the dead (Acts 9:36-4 1). Peter first received the revelation to admit Gentiles into the Church (Acts 10:9-16), and commanded that the first Gentile converts be baptized (Acts 10:44-48).
Is it not time to face the facts of reality and listen to Christ who founded His Church on St Peter – His Supreme Vicar with His authority to teach infallibly on faith and morals? Your progress in truth has been very welcome and impressive.