Tertullian, Irenaeus, and Jerome use Babylon as representing the Roman Empire. In the Middle Ages Rome is frequently styled the Western Babylon.
Just as the Nicolaitans worked their false teachings into the Church so does the Jesuit Priest bring into the Church their pagan teachings. Many give lip service, but their hearts are deceitful.
Seven heads are seven hills, which is Rome as Papal Rome sits on seven hills and she is the great whore. It's the Antichrist Jesuit Priest that will take his seat in Jerusalem and this will be the last abomination of desolation that will usher in that of Christ return. Matthew 24:15; Revelation Chapter 17
One of the abomination of desolation was 1260 years (a year is as a day with the Lord) of Papal Rome rule from 538AD with Emperor Justinian’s decree and under the military protection of Belisarius and the beast (Pope) until the deadly wound came in 1798 by General Berthier who made his entrance into Rome and abolished the papal government and established a secular one. This is also confirmed in Revelation 12:6 the church of Jesus would hide in the wilderness for exactly 1260 days (years) or 3 ½ years. This was the time when Rome persecuted the Christians and killed them which were approximately 500 million saints slain for the cause of their faith in Jesus. 1798 – 538 = 1260 days/years. Napoleon had closed down the Catholic Church and the Papacy and its power was thought to be forever broken. The wound was largely healed in 1929 when Mussolini gave the Vatican back to the Pope and established it as a country in it's own right in the Lateran Treaty. Today the Vatican has formal diplomatic relations with almost every country in the world.
Revelation 13:3 And I saw one of his heads as it were wounded to death; and his deadly wound was healed: and all the world wondered after the beast.
Revelation 13:12 and he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed.
Matthew 24:15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand
Revelation 12:6 and the woman (bride of Christ) fled into the wilderness, where she hath a place prepared of God that they should feed her there a thousand two hundred and threescore days.