Let me say this again:
It was not Rome that gave St. Peter the keys. It was God Himself. Are you denying that God did not give Peter the keys? We are not establishing anything from the Old Testament because it was in the New Testament that God gave the keys to Peter.
Lighthammer is correct. So far, I have not seen one Protestant say anything about Jesus giving the keys to the Apostle Peter. And Christ gave this key (which means "authority) to only one man.
Keys are used to open and close.
"I will give you the keys of the kingdom of heaven, AND whatever you loose on earth will be loosed on heaven." MT. 16:19
"I will place on his shoulder the key to the house of David; what he open no one can shut, and what he shuts no one can open." Is. 22:22
In Mt.18:18 Jesus is speaking to his discipleS and says "I tell you the truth, whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven."
The Mt 18 Scripture shows that the disciples were given the *same* authority. It seems that the RCC interprets the Mt 16 reference as giving only Peter this authority. But the passage does not make that a clear cut interpretation. Jesus was gathered with his disciples and asked them who people said He was and Peter inspired by the Father answered "You are the Christ, the Son of the living God."
Jesus then blesses Peter.
The RCC asserts that the keys to the kingdom were given to Peter alone, but the passage does not make that clear. Jesus may have been speaking to *all* the disciples in regards to the keys to the kingdom.
In fact, the later Scripture in Mt 18:18 when Jesus is clearly speaking to *all* the disciples would indicate that that authority *was* given to all the disciples, because Jesus repeats that " whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven" clearly indicating that this authority was not given to Peter alone.