Read Revelation 17-18
Revelation 17:5 And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.
Our relationship with God is compared often in Scripture with that of marriage. When we turn away from God we commit spiritual adultery. Therefore I believe this whore to be a ritualistic form of Christianity that has turned away from God. The city can only be Rome. During the Tribulation there is a temporary union of this church with the political powers; however, that union will be broken and the adulterous church will be destroyed.
Revelation 18:20 Rejoice over her, thou heaven, and ye holy apostles and prophets; for God hath avenged you on her. Revelation 18:24 And in her was found the blood of prophets, and of saints, and of all that were slain upon the earth.
The Roman emperors oversaw great persecution of Christians. Nero made torches out of tarred Christians, and he had them fight to the death against wild animals and gladiators. He also cut off their heads. When Rome became Christian it wasn’t long before the church began to rule over the governments of Europe. The Church of Rome began to persecute Baptist like people that didn’t submit to the authority of the Church of Rome. The city here appears to be Rome. No other city comes to mind that was responsible for more martyrs.
Proverbs 30:32 If thou hast done foolishly in lifting up thyself, or if thou hast thought evil, lay thine hand upon thy mouth.
We are not to lift ourselves up in pride. We must control our tongue, though it is the hardest organ for us to control. When pride controls our tongue, then discord and fighting are the results.