The Bible never mentions Peter having visited Rome even once. Peter was called to preach to the Jews. Not the Romans. Paul was sent to the Romans. I believe Constantine was a bit "confused" to say the least.
He was crucified upside down in Rome.
Can you give me the Book, Chapter and verse for that in the King James Bible, Avatar?
The Bible does not mention Peter visiting Rome even once. I know Peter was crucified upside down. Jesus was crucified right side up. Both died by a Roman Style execution. In Israel. Both tombs are located in Israel. Peter's tomb was reported to have been found in Israel which exposed the hoax and false claim that his body was at the Vatican and that he died in Rome.
As Peter's tomb was discovered in Israel that would have to be the place of his death.