A marked grave ain't enough?
after denying Christ, we dont hear about him much
Read the book called the "Bible". It is for sale in "Christian" book stores. Inside, look for Acts, two letters of Peter, and Galatians and do a word search for "Cephas" and "Peter".
Also, read the following in the Gospel of John (it is also a part of the "Bible" book):
Jesus saith to Simon Peter: Simon son of John, lovest thou me more than these? He saith to him: Yea, Lord, thou knowest that I love thee. He saith to him: Feed my lambs. 16 He saith to him again: Simon, son of John, lovest thou me? He saith to him: Yea, Lord, thou knowest that I love thee. He saith to him: Feed my lambs. 17 He said to him the third time: Simon, son of John, lovest thou me? Peter was grieved, because he had said to him the third time: Lovest thou me? And he said to him: Lord, thou knowest all things: thou knowest that I love thee. He said to him: Feed my sheep. 18 Amen, amen I say to thee, when thou wast younger, thou didst gird thyself, and didst walk where thou wouldst. But when thou shalt be old, thou shalt stretch forth thy hands, and another shall gird thee, and lead thee whither thou wouldst not. 19 And this he said, signifying by what death he should glorify God. And when he had said this, he saith to him: Follow me.This is after the betrayal.
The "Bible" book is also available online: Douay-Rheims Bible
It is good that you have such vibrant interest in Christianity. I'll be glad to help if you have questions, as will many others.
Act 20:28 Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.
And who ordained the overseers??? Was it Peter??? Nope...How about Paul??? Nope...It was the Holy Ghost...
Was 'feed the flock' a special admonition given to only Peter??? Of course not...
And what was the food that was to be fed???
I said that we dont hear MUCH about Peter after he betrayed Jesus and we dont. I didnt say that we never hear about him again. He betrayed Jesus and was forgiven, however, his position within the fold diminished considerably after that.
This still does not answer my original question were is there physical proof that Peter ever visited Rome?