'Angel of the Church' in the Bible

And to the angel of the church in Smyrna write; The first and the last, who was dead, and is alive, says these things:

To the angel of the church in Pergamum write; The one having the sharp, two-edged sword says these things;

And to the angel of the church among the Thyatireans write; The Son of God, the one having eyes like a flame of fire, and his feet like burnished brass, says these things;

And to the angel of the church in Sardis write; The one having the seven Spirits of God, and the seven stars, says these things; I know your works, that you have a name that you are living, and are dead.

And to the angel of the church in Philadelphia write; The holy, true one, the one having the key of David, the one opening, and no one shall shut; and the one shutting, and no one shall open; says these things.

And to the angel of the church in Laodicea write; The Amen, the faithful and true witness, the beginning of the creation of God, says these things;