The book of Revelation is believed to have been written for the seven churches of Asia Minor :
1) Ephesus (Revelation 2:1-7)
2) Smyrna (Revelation 2:8-11)
3) Pergamum (Revelation 2:12-17)
4) Thyatira (Revelation 2:18-29)
5) Sardis (Revelation 3:1-6)
6) Philadelphia (Revelation 3:7-13)
7) Laodicea (Revelation 3:14-22)