'Seven Churches' in the Bible

John to the seven churches in Asia---Grace and peace be to you, from Him who is, and who was, and who is to come; and from the seven Spirits which are before his throne;

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

As to the mystery of the seven stars which thou sawest in my right hand, and the seven golden candlesticks; the seven stars are the angels of the seven churches, and the seven candlesticks which thou sawest are the seven churches.