Later in life, Peter spent time with John Mark (1 Peter 5:13), who wrote the gospel of Mark based on Peter’s remembrances of his time with Jesus. Peter wrote two inspired epistles, 1 and 2 Peter, between A.D. 60 and 68. Jesus said that Peter would die a martyr’s death (John 21:18-19)—a prophecy fulfilled, presumably, during Nero’s reign. Tradition has it that Peter was crucified upside down in Rome, and, although such the story may be true, there is no scriptural or historical witness to the particulars of Peter’s death.