Could you provide Patristic commentary that supports this interpretation of Matthew 16:18-19? Specifically I mean that St. Peter alone is given the keys, and therefore exercise an authority that the other apostles do not.
ST. OPTATUS OF MILEVIS (A.D. 370)
“For the good of unity blessed Peter, for whom it would have been enough if after his denial he had obtained pardone only, deserved to be placed before all the apostles, and alone received the keys of the kingdom of heaven, to be communicated to the rest.” (De Schismate Donatistorum,7:3).
St. Theodore the Studite of Constantinople (759-826):
Writing to Pope Leo III …
Since to great Peter Christ our Lord gave the office of Chief Shepherd after entrusting him with the keys of the Kingdom of Heaven, to Peter or his successor must of necessity every novelty in the Catholic Church be referred. [Therefore], save us, oh most divine Head of Heads, Chief Shepherd of the Church of Heaven. (Theodore, Bk. I. Ep. 23)
St Gregory I
To all who know the Gospel it is clear that by the words of our Lord the care of the whole Church was committed to Blessed Peter, the Prince of the Apostles . . . Behold, he received the keys of the kingdom of heaven…{Epistles, 5, 37; to Emperor Maurice}
Augustine cont. Re: Peter’s primacy
“Among these [apostles] it was only Peter who almost everywhere was given privilege of representing the whole Church. It was in the person of the whole Church, which he alone represented, that he was privileged to hear, ‘To you will I give the keys of the kingdom of heaven’ (Mt 16:19)… Quite rightly too did the Lord after his resurrection entrust his sheep to Peter to be fed. It’s not, you see, that he alone among the disciples was fit to feed the Lord’s sheep; but when Christ speaks to one man, unity is being commended to us. And he first speaks to Peter, because Peter is first among the apostles.”
(Sermon 295:2-4 (A.D. 410), in WOA3,8:197-199)
Pope Leo I
“Now eight years ago, in the time of my predecessor of holy memory Pelagius, our brother and fellow-bishop John in the city of Constantinople, . . . held a synod in which he attempted to call himself Universal Bishop. Which as soon as my said predecessor knew, he dispatched letters annulling by the authority of the holy apostle Peter the acts of the said synod; of which letters I have taken care to send copies to your Holiness.”{Epistle XLIII, emphasis added}
“To all who know the Gospel it is clear that by the words of our Lord the care of the whole Church was committed to Blessed Peter, the Prince of the Apostles . . . Behold, he received the keys of the kingdom of heaven, the power to bind and loose was given to him, and the care and principality of the entire church was committed to him . . . Yet he was not the universal Apostle. But . . . John would be called universal Bishop . . . [Popes had never assumed this title, though it had been given them], lest all the Bishops be deprived of their due meed of honor whilst some special honor be conceded to one.”{Epistles, 5, 37; to Emperor Maurice, emphasis added}
Cyril of Jerusalem
In the power of the same Holy Spirit, Peter, both the chief of the apostles and the keeper of the keys of the kingdom of heaven, in the name of Christ healed Aeneas the paralytic at Lydda, which is now called Diospolis [Acts 9 ;3 2-3 4] (Catechetical Lectures 17;27 [A.D. 350]).
Chrysostom
(Peter), the foundation of the Church, the Coryphaeus of the choir of the Apostles, the vehement lover of Christ …he who ran throughout the whole world, who fished the whole world; this holy Coryphaeus of the blessed choir; the ardent disciple, who was entrusted with the keys of heaven, who received the spiritual revelation. Peter, the mouth of all Apostles, the head of that company, the ruler of the whole world. (De Eleemos, iii. 4; Hom. de decem mille tal. 3)
Writing to Pope Leo III …
Since to great Peter Christ our Lord gave the office of Chief Shepherd after entrusting him with the keys of the Kingdom of Heaven, to Peter or his successor must of necessity every novelty in the Catholic Church be referred. [Therefore], save us, oh most divine Head of Heads, Chief Shepherd of the Church of Heaven. (Theodore, Bk. I. Ep. 23)
(cont) Writing to Emperor Michael, …
I witness now before God and men, they have torn themselves away from the Body of Christ, from the Supreme See (Rome), in which Christ placed the keys of the Faith, against which the gates of hell (I mean the mouth of heretics) have not prevailed, and never will until the Consummation, according to the promise of Him Who cannot lie. Let the blessed and Apostolic Paschal (Pope St. Paschal I) rejoice therefore, for he has fulfilled the work of Peter. (Theodore Bk. II. Ep. 63).