Domitian (ruled 83-95 AD) was the son of emperor Vespasian (ruled 68-79 AD). He declared himself a god and was best known for his proclamation that he be worshiped by all. The Christian persecution began under Nero but it got to a whole new level under Domitian. He ordered that all Christians who did not worship him be sent to Patmos, a Greek prison island. Among the believers sent there was the Apostle John who saw the visions and wrote the book of Revelation while on Patmos.