About AD 95, late in Domitian's reign
Held by Irenaeus (about AD 180) and most scholars today
For
- Irenaeus (Against Heresies 5.30.3) says John saw the vision towards the end of Domitian's reign.
- The letters assume settled churches with a history of their own, which suits a later date.
Against
- Irenaeus wrote almost a century later, and the beast's number seems to allude to Nero.
Sources: Wikipedia, "Book of Revelation"; Wikipedia, "John of Patmos"