John of Patmos is the name traditionally given to the author of the Book of Revelation. Revelation 1:9 states that John was on Patmos, an Aegean island off the coast of Roman Asia, where according to most biblical historians, he was exiled as a result of anti-Christian persecution under the Roman emperor Domitian.

The Book of Revelation or Book of the Apocalypse is the final book of the New Testament. Written in Koine Greek, its title is derived from the first word of the text: apokalypsis, meaning 'unveiling' or 'revelation'. The Book of Revelation is the only apocalyptic book in the New Testament canon. It occupies a central place in Christian eschatology.