Revelation is the only New Testament book that indicates the location of its composition. Of volcanic hills and rocky ground Patmos is a small Greek island in the Aegean Sea. Although Patmos was not mentioned, Tacitus writes that small Greek islands were often used for political banishment (Annals 3:68; 4:30; 15:17), and Eusebius writes that the apostle John was exiled in 95 AD by the Emperor Domitian, which ended 18 months later with the ascension of Nerva in 96 (Ecclesiastical History).