Indeed. I have seen pictures taken in a Roman church monastery in the Holy Land of what the monks believe is the ossuary the apostle Peter.
Another question is, did the apostle Peter ever go to Rome? If so, why did Paul not mention Peter in his Epistle to the Romans?
Amen! Time wise, they were contemporaries in Jerusalem and were in Rome at the same time, you would think Paul would have mentioned Peter in his writings? After all they were “buds” in Jerusalem.
Answer. Yes-We have the writings of early Church Fathers
Here.....
“Through envy and jealousy, the greatest and most righteous pillars [of the Church] have been persecuted and put to death. Let us set before our eyes the illustrious apostles. Peter, through unrighteous envy, endured not one or two, but numerous labours and when he had at length suffered martyrdom, departed to the place of glory due to him.” Clement of Rome, The First Epistle of Clement, 5 (c. A.D. 96).
“I do not, as Peter and Paul, issue commandments unto you.” Ignatius of Antioch, Epistle to the Romans, 4 (c. A.D. 110).
‘You have thus by such an admonition bound together the plantings of Peter and Paul at Rome and Corinth.” Dionysius of Corinth, Epistle to Pope Soter, fragment in Eusebius’ Church History, II:25 (c. A.D. 178).
“Matthew also issued a written Gospel among the Hebrews in their own dialect, while Peter and Paul were preaching at Rome, and laying the foundations of the Church.” Irenaeus, Against Heresies, 3:1:1 (c. A.D. 180).
“As Peter had preached the Word publicly at Rome, and declared the Gospel by the Spirit, many who were present requested that Mark, who had followed him for a long time and remembered his sayings, should write them out.” Clement of Alexandria, fragment in Eusebius Church History, VI:14,6 (A.D. 190)
“It is, therefore, recorded that Paul was beheaded in Rome itself, and that Peter likewise was crucified under Nero. This account of Peter and Paul is substantiated by the fact that their names are preserved in the cemeteries of that place even to the present day. It is confirmed likewise by Caius, a member of the Church, who arose under Zephyrinus, bishop of Rome. He, in a published disputation with Proclus, the leader of the Phrygian heresy, speaks as follows concerning the places where the sacred corpses of the aforesaid apostles are laid: ‘But I can show the trophies of the apostles. For if you will go to the Vatican or to the Ostian way, you will find the trophies of those who laid the foundations of this church.’” Gaius, fragment in Eusebius’ Church History, 2:25 (A.D. 198).
“[W]hat utterance also the Romans give, so very near (to the apostles), to whom Peter and Paul conjointly bequeathed the gospel even sealed with their own blood.” Tertullian, Against Marcion, 4:5 (inter A.D. 207-212).
‘We read the lives of the Caesars: At Rome Nero was the first who stained with blood the rising blood. Then is Peter girt by another (an allusion to John 21:18), when he is made fast to the cross.” Tertullian, Scorpiace, 15:3 (A.D. 212).
“Peter...at last, having come to Rome, he was crucified head-downwards; for he had requested that he might suffer this way.” Origen, Third Commentary on Genesis, (A.D. 232).
“Thus Peter, the first of the Apostles, having been often apprehended, and thrown into prison, and treated with igominy, was last of all crucified at Rome.” Peter of Alexandria, The Canonical Epistle, Canon 9 (A.D. 306).