Revelation Churches in Anatolia
St. John and Letters to Seven Churches
In the book, Revelation of St. John, there is a remarkable part 2:1 to 3:22. This passage contains the Seven Letters. Some of this passage is here:
Directions what to write to the angels or bishops of Ephesus, Smyrna, Pergamus and Thyatira.
 Unto the angel of the church of Ephesus write: These things saith he, who holdeth the seven stars in his right hand, who walketh in the midst of the seven golden candlesticks:  I know thy works, and thy labour, and thy patience, and how thou canst not bear them that are evil, and thou hast tried them, who say they are apostles, and are not, and hast found them liars:  And thou hast patience, and hast endured for my name, and hast not fainted.  But I have somewhat against thee, because thou hast left thy first charity.  Be mindful therefore from whence thou art fallen: and do penance, and do the first works. Or else I come to thee, and will move thy candlestick out of its place, except thou do penance.
 But this thou hast, that thou hatest the deeds of the Nicolaites, which I also hate.  He, that hath an ear, let him hear what the Spirit saith to the churches: To him, that overcometh, I will give to eat of the tree of life, which is in the paradise of my God.  And to the angel of the church of Smyrna write: These things saith the First and the Last, who was dead, and is alive:  I know thy tribulation and thy poverty, but thou art rich: and thou art blasphemed by them that say they are Jews and are not, but are the synagogue of Satan.  Fear none of those things which thou shalt suffer. Behold, the devil will cast some of you into prison that you may be tried: and you shall have tribulation ten days. Be thou faithful until death: and I will give thee the crown of life.