“Peter you are Rock, and upon this Rock I will build my Church”
Peter believed in Purgatory.
Peter and the early Church had no problem with the Deuterocanonical texts, which supported purgatory.
Matt. 16:18
And I say also unto thee, That thou art Peter (petros - proper masculine noun; a rock or stone detached, large fragment), and upon this rock (petra - femine noun - a large rock, cliff, ledge, massive living rock) I will build my church; and the gates of hell shall not prevail against it.
JESUS was the Rock, not Peter. He was a pebble, a shepherd for the flock. There IS no indication in Scripture that Peter was Pope.