The end time Babylon Harlot is a "great city", not the EU, not Rome, not New York or America, etc. The phrase "great city" is mentioned 11 times in the Book of Revelation, and in final it is about the Holy Jerusalem descending down out of Heaven from God. Here is the first "great city" pointer in Revelation: Rev 11:8 8 And their dead bodies shall lie in the street of the great city, which spiritually is called Sodom and Egypt, where also our Lord was crucified. (KJV) That's about God's two witnesses being killed with the dead bodies being left laying in the street. Where was our Lord Jesus of Nazareth crucified? At Jerusalem. In Isaiah 1 and Jeremiah 23 God called the leaders of Jerusalem that had led His people astray as rulers of Sodom and Gomorrah. So this Rev.11:8 verse is the first huge clue that Jerusalem is the subject of the final Babylon Harlot of Revelation. The following verse reveals the Babylon Harlot is about a "great city": Rev 17:17-18 17 For God hath put in their hearts to fulfil His will, and to agree, and give their kingdom unto the beast, until the words of God shall be fulfilled. 18 And the woman which thou sawest is that great city, which reigneth over the kings of the earth. (KJV) In final though, the Babylon Harlot Jerusalem for the end is to be replaced with The Holy Jerusalem from above: Rev 21:9-10 9 And there came unto me one of the seven angels which had the seven vials full of the seven last plagues, and talked with me, saying, Come hither, I will shew thee the bride, the Lamb's wife. 10 And he carried me away in the spirit to a great and high mountain, and shewed me that great city, the holy Jerusalem, descending out of heaven from God, (KJV) So how can this be about Jerusalem some might be wondering? It's because just as Judah fell away in old times that caused God to bring the king of Babylon upon them and take Jerusalem, and then carry them captive to Babylon for 70 years, likewise Judah's falling away to reject Jesus of Nazareth as The Christ with the object to build a third temple in Jerusalem and start up the Old Testament sacrificial worship again is going to cause its final destruction. Jerusalem is where our Lord Jesus warned about the "abomination of desolation" idol of the Book of Daniel being setup there, and for those of His there to flee Jerusalem when they see that event unfold. The Romans in 70 A.D. never fulfilled the placing of that abomination idol in the holy place because the temple burned down before they could get possession of it (per Jewish historian Josephus).