what are the seven churches mentioned in the book of revelation
Seven churches of Asia In an early part of the Revelation, on the Greek island of Patmos, Jesus Christ instructs his servant John of Patmos, through an angelic intermediary, 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."[1]
Nicolaism Nicolaism (also Nicholaism, Nicolaitism, Nicolationism, or Nicolaitanism) is a Christian heresy first mentioned (twice) in the Book of Revelation of the New Testament, whose adherents were called Nicolaitans, Nicolaitanes, or Nicolaites. According to Revelation 2:6 and 15,[1] they were known in the cities of Ephesus and Pergamum. In this chapter, the church at Ephesus is commended for "[hating] the works of the Nicolaites, which I also hate"; and the church in Pergamos is rebuked: "So thou hast also some [worshiping in their midst] who hold the teaching of the Nicolaites".