Which cities were located in the biblical region of Asia?

Les explains that in Paul's terminology, Asia referred to the western half of Turkey as we know it, the area where he established so many churches. He lists Ephesus, Thyatira, Pergamos, Derbe, Lystra, and Antioch in Pisidia as all being in what Scripture calls Asia or Asia Minor. Paul then says that all they in Asia had turned away from him, and Les notes that Phagellus and Hermogenes were the leaders of that turning away. Les finds it heart-wrenching that after Paul's years of privation, he had to conclude that all these congregations he founded in the gospel of grace and knowledge of the mysteries had turned aside. Les marvels that but for the grace of God, Christianity would never have gotten off the ground, as it was constantly under satanic attack, and he thanks the Lord that it survived so we today have the Word of God. He notes even today the fundamentals of Christianity are under constant attack from within and without Christendom, giving us a taste of what Paul was talking about.