Christian tradition says that John the Evangelist was one of Christ's original twelve apostles; the only one to live into old age; and not killed for his faith. John the Evangelist is associated with Ephesus, where he is said to have lived and been buried. Some believe that after a short life he was exiled to (c.a. 95) Patmos, where he wrote the Book of Revelation.
The Gospel of John refers to an unnamed "Beloved Disciple" of Jesus who bore witness to the gospel's message. The composer of the Gospel of John seemed interested in maintaining the internal anonymity of the author's identity. The apostle John was a historical figure, one of the "pillars" of the Jerusalem church after Jesus' death.