Yes, the Seven Churches mentioned by John in the Book of Revelation (1:11) are all found in western Turkey, and each had a Christian community in the first-century A.D.
Ephesus Revelation 2:1-7; Acts 18:19-21; 19:1-41
Smyrna Revelation 2:8-11
Pergamum Revelation 2:12-17
Thyatira Revelation 2:18-29; Acts 16:14
Sardis Revelation 3:1-6
Philadelphia Revelation 3:7-13
Laodicea Revelation 3:14-22