Interesting, isn’t it, that Peter himself says that CHRIST is the rock. Peter never makes that claim for himself.
I’m not the one who needs to read Scripture. Try it yourself for a change.
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1 Peter 2:4-8 As you come to him, a living stone rejected by men but in the sight of God chosen and precious, you yourselves like living stones are being built up as a spiritual house, to be a holy priesthood, to offer spiritual sacrifices acceptable to God through Jesus Christ. For it stands in Scripture:
“Behold, I am laying in Zion a stone,
a cornerstone chosen and precious,
and whoever believes in him will not be put to shame.”
So the honor is for you who believe, but for those who do not believe,
“The stone that the builders rejected
has become the cornerstone,”
and
“A stone of stumbling,
and a rock of offense.”
They stumble because they disobey the word, as they were destined to do.
Questions and Answers about the Marks and Attributes of the Church
152. Which is the one true Church established by Christ?
The one true Church established by Christ is the Catholic Church.
(a) Many churches which claim to be Christian have broken away from the one true Church established by Jesus Christ. These churches were founded by men who had no authority from God to found a church.
(b) Christ intended that there should be only one true Christian Church, for He always spoke of His Church as one.
153. How do we know that the Catholic Church is the one true Church established by Christ?
We know that the Catholic Church is the one true Church established by Christ because it alone has the marks of the true Church..................
http://www.ewtn.com/faith/teachings/chura2a.htm