The Babylon described in Revelation is called “Mystery Babylon.” The prophecy of Mystery Babylon is found in Revelation 17:3-5.
“So he carried me away in the spirit into the wilderness: and I saw a woman sit upon a scarlet colored beast, full of names of blasphemy, having seven heads and ten horns. And the woman was arrayed in purple and scarlet color, and decked with gold and precious stones and pearls, having a golden cup in her hand full of abominations and filthiness of her fornication: And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.”
anon... this link (especially below the quoted) may be relevant...