'Seven Churches' in the Bible

From John to the seven churches in Asia. May grace and peace be yours from the one who is, who was, and who is coming, from the seven spirits who are in front of his throne,

saying, "Write on a scroll what you see, and send it to the seven churches: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and Laodicea."

The secret meaning of the seven stars that you saw in my right hand and the seven gold lamp stands is this: the seven stars are the messengers of the seven churches, and the seven lamp stands are the seven churches."