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

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