Isle of Patmos
John was exiled to Patmos because of his testimony – A fellow participant in the Tribulation and Perseverance in Jesus. Patmos is a small island in the Aegean Sea approximately ninety kilometers from the city of Ephesus. It is eleven kilometers long by seven wide, making it one of the smaller islands of the Sporades , an archipelago off the west coast of Asia Minor. Roman literature from the period identifies this group of islands as a place where political offenders were exiled - ( Tacitus, Ann. iii . 68; iv. 30; v. 71).