Whore of Babylon
The Whore of Babylon was a (symbolic) woman that an angel showed to John of Patmos. The angel explained to John that the woman represents a great city.
The woman whom you saw is the great city, which reigns over and dominates and controls the kings and the political leaders of the earth.— Revelation 17:18 (AMP)
The woman was engaged in all sorts of sin and the murder of saints. John provided a description of her in Chapter 17 of the Book Revelation.
Then one of the seven angels who had the seven bowls came and spoke with me, saying,Come here, I will show you the judgment and doom of the great prostitute who is seated on many waters [influencing nations], she with whom the kings of the earth have committed acts of immorality, and the inhabitants of the earth have become intoxicated with the wine of her immorality.And the angel carried me away in the Spirit into a wilderness; and I saw a woman sitting on a scarlet beast that was entirely covered with blasphemous names, having seven heads and ten horns. The woman was dressed in purple and scarlet, and adorned with gold, precious stones and pearls, [and she was] holding in her hand a gold cup full of the abominations and the filth of her [sexual] immorality. And on her forehead a name was written, a mystery:BABYLON THE GREAT, THE MOTHER OF PROSTITUTES (false religions, heresies) AND OF THE ABOMINATIONS OF THE EARTH.I saw that the woman was drunk with the blood of the saints (God’s people), and with the blood of the witnesses of Jesus [who were martyred]. When I saw her, I wondered in amazement.— Revelation 17:1–17:6 (AMP)
The angels described Babylon's destruction and desolation to John, which is recorded in Chapters 17 and 18 of Revelation.
Then the angel said to me,The waters which you saw, where the prostitute is seated, are peoples and multitudes and nations and languages. And the ten horns which you saw, and the beast, these will hate the prostitute and will make her desolate and naked [stripped of her power and influence], and will eat her flesh and completely consume her with fire. For God has put it in their hearts to carry out His purpose by agreeing together to surrender their kingdom to the beast, until the [prophetic] words of God will be fulfilled.— Revelation 17:15–17:17 (AMP)
After these things I saw another angel coming down from heaven, possessing great authority, and the earth was illuminated with his splendor and radiance. And he shouted with a mighty voice, saying,Fallen, fallen [certainly to be destroyed] is Babylon the great! She has become a dwelling place for demons, a dungeon haunted by every unclean spirit, and a prison for every unclean and loathsome bird. For all the nations have drunk from the wine of the passion of her [sexual] immorality, and the kings and political leaders of the earth have committed immorality with her, and the merchants of the earth have become rich by the wealth and economic power of her sensuous luxury.— Revelation 18:1–18:3 (AMP)
John is told that kings, politicians, merchants, and sailors will miss Babylon. John also learned of and recorded God's divine judgement against Babylon.
And I heard another voice from heaven, saying,Come out of her, my people, so that you will not be a partner in her sins and receive her plagues; for her sins (crimes, transgressions) have piled up as high as heaven, and God has remembered her wickedness and crimes [for judgment]. Repay to her even as she has repaid others, and pay back [to her] double [her torment] in accordance with what she has done; in the cup [of sin and suffering] which she mixed, mix a double portion [of perfect justice] for her. To the degree that she glorified herself and reveled and gloated in her sensuality [living deliciously and luxuriously], to that same degree impose on her torment and anguish, and mourning and grief; for in her heart she boasts,I sit as a queen [on a throne] and I am not a widow, and will never, ever see mourning or experience grief.For this reason in a single day her plagues (afflictions, calamities) will come, pestilence and mourning and famine, and she will be burned up with fire and completely consumed; for strong and powerful is the Lord God who judges her.— Revelation 18:4–18 (AMP)
Rejoice over her, O heaven, and you saints (God’s people) and apostles and prophets [who were martyred], because God has executed vengeance for you [through righteous judgment] upon her.
Then a single powerful angel picked up a boulder like a great millstone and flung it into the sea, saying,With such violence will Babylon the great city be hurled down [by the sudden, spectacular judgment of God], and will never again be found. And the sound of harpists and musicians and flutists and trumpeters will never again be heard in you, and no skilled artisan of any craft will ever again be found in you, and the sound of the millstone [grinding grain] will never again be heard in you [for commerce will no longer flourish, and normal life will cease]. And never again will the light of a lamp shine in you, and never again will the voice of the bridegroom and bride be heard in you; for your merchants were the great and prominent men of the earth, because all the nations were deceived and misled by your sorcery [your magic spells and poisonous charm]. And in Babylon was found the blood of prophets and of saints (God’s people) and of all those who have been slaughtered on the earth.— Revelation 18:20–18:24 (AMP)