John of Patmos was a first-century prophet and saint traditionally credited with writing the Book of Revelation. Born in Galilee, he is associated with the Aegean island of Patmos, where he was reportedly exiled during the Roman rule of Emperor Domitian. While early Christian tradition often identified him as John the Apostle, many scholars and ancient clerics have distinguished the author of the apocalypse from the disciple of Jesus, sometimes attributing the work to a figure known as John the Presbyter.