knows when the Apocalypse was written and who wrote it.  John Chrysostom in 395.  This John was in Ephesus in 401 replacing seven bishops when five of the seven dynasties of the Roman Empire had already fallen.  Nikolai Alexandrovich Morozov is the astronomer.  Most of us know that the Apocalypse was written well before 395 but few understand that three Johns are  involved.  John the Baptist, John the Apostle, and John Chrysostom