'Seven Churches' in the Bible

John sends greetings to the seven Churches in the province of Asia. May grace be granted to you, and peace, from Him who is and was and evermore will be; and from the seven Spirits which are before His throne;

It said, "Write forthwith in a roll an account of what you see, and send it to the seven Churches--to Ephesus, Smyrna, Pergamum, Thyateira, Sardis, Philadelphia and Laodicea."

the secret meaning of the seven stars which you have seen in My right hand, and of the seven lampstands of gold. The seven stars are the ministers of the seven Churches, and the seven lampstands are the seven Churches.