(PDF)
What Happened to the Seven Churches?
EPHESUS, SMYRNA, and PERGAMUM (the three west coast cities): Because these three cities were located on the west coast of Turkey, closest to Rome, they would have been the first ones to hear about the Neronic persecution and to feel its impact. If the news about the Neronic persecution first came by boat to the port cities of Ephesus and Smyrna, there would have been no time for escape. The Christians would have been rounded up and killed immediately without opportunity to flee. That may be why there is no mention here in Revelation of anyone in those three cities living and remaining until the Parousia. It only mentions "overcomers" (martyrs) in those three cities (gold highlights), implying that few (if any) would live and remain until the Parousia. However, Christians in the other four cities further inland might have had a better chance of being forewarned, and a few of them may have fled to safety. That may be why we see some of the faithful saints who lived and remained faithful until the Parousia being mentioned here in the letters to the other four cities (green highlights).
SMYRNA, THYATIRA, and PHILADELPHIA: In the case of these three cities, Jesus explicitly tells them what is actually going to happen to them during the upcoming tribulation. He is not as specific to the other four cities regarding what they were about to experience, but there was enough information given, which if it was heeded and followed, would have saved some of them from the worst part of the persecution and death. Unfortunately, it does not appear that very many of them heeded those warnings. For instance, to the church at Smyrna, Jesus told them that some of them were about to suffer imprisonment, tribulation, and death. They would have to endure ten days of tribulation. The church in Thyatira was told that Christ would throw Jezebel on a sickbed and those who were associated with her into great tribulation. Her children would be killed with pestilence. Then Jesus told the saints at Philadelphia that He would make the Jews come and bow down at their feet, and would keep them from the hour of testing which was about to come ("quickly"). Note the mention of a synagogue and Jews there in Philadelphia at the time of writing, implying that the Jews were still a strong factor in that community at the time of writing. This points unmistakably to a pre-70 date.
SMYRNA: There was a considerable number of Jews living in Smyrna who took advantage of every opportunity to kill the Christians. For instance, when Polycarp was being killed by the Roman authorities in the middle of the second century, the Jews there in Smyrna broke their Sabbath in order to pile up the wood for his burning at the stake. The Jews were most likely involved in using the Neronic persecution as an opportunity to eliminate all the Christians from Smyrna and all the other cities in Asia. Rev. 2:9 says that there was a synagogue there who were claiming to be true godly Jews, but were instead a synagogue of Satan. That fits a pre-70 timeframe very well when there was a strong Jewish community in Smyrna until the war broke out in Judea in AD 66.
PHILADELPHIA: Like Smyrna, Philadelphia evidently had a significant community of Jews living there who claimed to be true Jews, but were instead a synagogue of Satan. This again reflects conditions that were definitely appropriate to AD 62, but which would hardly have been possible in AD 95.
When looking at all the warnings to these seven literal churches in the seven cities of Asia, who were told that these tribulations and trials and persecutions were about to be unleashed upon them, we notice that there was no fulfillment shortly after AD 95. One looks in vain for a historical event which fulfilled all those dire pronouncements about "the hour of testing which was about to come upon the whole world to test those who dwell on the earth" (Rev. 3:10-11). When did that happen shortly after AD 95? What event fulfilled that prediction literally? It is easy to see how this applies to AD 70, but there is nothing shortly after AD 95 to fulfill it. The late-daters and futurists totally ignore this problem.