▼1:9John was on Patmos, in my chronology, in the early A.D. 80’s, beginning about A.D. 82, for about 2 or 3 years or so. He was put there by the emperor Domitian, who had first tried to have John killed. John was placed in a pot of boiling oil. All the other 11 of the 12 Apostles (Matthias replacing Judas) had already been martyred. But John was not martyred. When he came out of the boiling oil, he was unharmed and looked refreshed, as if he had just taken a bath in water, rather than boiling oil. So the emperor, unaffected by this miracle, exiled John to Patmos, where other Christians also had been exiled, working in the copper mines there. John became a target of Domitian because John had, some years earlier, written the Gospel of John.(Conte)