'Seven Churches' in the Bible

JOHN to the seven churches which are in Asia: favour and peace be with you from him WHO IS, WHO WAS, WHO WILL BE; and from the seven spirits who are before his throne;

saying, "I am Alpha and Omega, the first and the last: and, what you shall see, write in a book, and send it to the seven churches which are in Asia; to Ephesus, to Smyrna, to Pergamos, to Thyatira, to Sardis, to Philadelphia, and to Laodicea."

the conceal'd meaning of the seven stars which you saw in my right hand, and of the seven golden candlesticks, is this: the seven stars signify the angels of the seven churches: and the seven candlesticks which you saw, signify the seven churches.