But of the passage Matt. xvi., which is more frequently quoted by Popes and Papists than any other passage in the Bible, there are no less than five different patristic interpretations; the rock on which Christ built his Church being referred to Christ by sixteen Fathers (including Augustine); to the faith or confession of Peter by forty-four (including Chrysostom, Ambrose, Hilary, Jerome, and Augustine again); to Peter professing the faith by seventeen; to all the Apostles, whom Peter represented by his primacy, by eight; to all the faithful, who, believing in Christ as the Son of God, are constituted the living stones of the Church.
Appears that none of the early 'church' fathers figured Peter was the 'rock'...Wonder where that fallacy started...