I have heard it said that St. Peter never was in Rome.

The Catholic Answers

You may have heard that stated, but you have never heard any proof advanced in its favor. It is simple history that St. Peter went to Rome about the year 43 A.D., went back to Jerusalem after a few years for a short time, and then returned to Rome until his death, save for very short absences. He died about the year 67, during the reign of Nero. Papias wrote, about 140 A.D., “Peter came and first by his salutary preaching of the Gospel and by his keys opened in the city of Rome the gates of the heavenly kingdom.” Lanciani, the eminent archaeologist, wrote, “The presence of St. Peter in Rome is a fact demonstrated beyond a shadow of doubt by purely monumental evidence.”

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty