Revelation 2:13 “I know your works, and where you dwell, where Satan’s throne is. And you hold fast My name, and did not deny My faith even in the days in which Antipas was My faithful martyr, who was killed among you, where Satan dwells.
Pergamos appears to have been a residence for the throne of Satan. That is, his power base had been consolidated at Pergamos at the time. If this sounds strange, consider our Lord’s words to the seven Asiatic churches.
