In an early part of the Revelation, on the Greek island of Patmos, Jesus Christ instructs John of Patmos to: "Write on a scroll what you see and send it to the seven churches: to Ephesus, and to Smyrna, and to Pergamum, and to Thyatira, and to Sardis, and to Philadelphia, and to Laodicea. ''
who wrote the letters to the 7 churches
John of Patmos