'Seven Churches' in the Bible

John to the seven churches which in Asia: Grace to you, and peace, from him who being, and who was, and who coming; and from the seven Spirits which are before his throne

I am the Alpha and the Omega, the first and the last: and, What thou seest, write in a book, and send to the seven churches which in Asia; to Ephesus, and to Smyrna, and to Pergamos, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea.

The mystery of the seven stars which thou sawest upon my right hand, and the seven golden chandeliers. The seven stars are the messengers of the seven churches: and the seven chandeliers which thou sawest are the seven churches.