"The beast that the woman rides is the world’s political-religious systems opposed to the True God, the Trinity, Who is the Creator and Ruler over all. These taken together are the precursor of the final beast of verse 11 which includes all the former systems within it."
The Apocalypse, the Book of the Revelation: 17.
2 … Scripture reference – Rev.: 18:3, 9; Isaiah: 23:17; Rev.: 14:8
3 … Scripture reference – Rev.: 12:3; 13:1
4 … Scripture reference – Rev.: 18:16
5 … Scripture reference – Rev.: 19:2
6 … Scripture reference –
7 … Scripture reference –
8 … Scripture reference – Rev.: 17:11; 11:7!; 13:3, 8!
9 … Scripture reference – Rev.: 13:18
10 … Scripture reference –
11 … Scripture reference – Rev.: 17:8
12 … Scripture reference – Dan.: 7:24
13 … Scripture reference –
14 … Scripture reference – Rev.: 19:16; 1Tim.: 6:15!
15 … Scripture reference –
16 … Scripture reference – Rev.: 19:20; Dan.:7:11
17 … Scripture reference – Prv.: 21:1
18 … Scripture reference –
1 And there came one of the seven angels who had the seven vials and
spoke with me, saying: Come, I will shew thee the condemnation of the
great harlot, who sitteth upon many waters: … Scripture reference –
Rev.: 15:1,6; 21:9; 19:2
2 With whom the kings of the earth have
committed fornication. And they who inhabit the earth have been made
drunk with the wine of her whoredom. … Scripture reference – Rev.: 18:3,
9; Isaiah: 23:17; Rev.: 14:8
3 And he took me away in spirit into
the desert. And I saw a woman sitting upon a scarlet coloured beast,
full of names of blasphemy, having seven heads and ten horns. …
Scripture reference – Rev.: 12:3; 13:1
4 And the woman was clothed
round about with purple and scarlet, and gilt with gold and precious
stones and pearls, having a golden cup in her hand, full of the
abomination and filthiness of her fornication. … Scripture reference –
5 And on her forehead a name was written: A mystery:  Babylon the great, the mother of the fornications and the abominations of the earth. … Scripture reference – Rev.: 19:2
6 And I saw the woman drunk with the blood of the saints and with the
blood of the martyrs of Jesus. And I wondered, when I had seen her, with
mystery of the woman and of the beast which carrieth her, which hath the
seven heads and ten horns.
8 The beast which thou sawest, was, and
is not, and shall come up out of the bottomless pit and go into
destruction. And the inhabitants on the earth (whose names are not
written in the book of life from the foundation of the world) shall
wonder, seeing the beast that was and is not. … Scripture reference –
Rev.: 17:11; 11:7!; 13:3, 8!
9 And here is the understanding that
hath wisdom. The seven heads are seven mountains, upon which the woman
sitteth: and they are seven kings. … Scripture reference – Rev.: 13:18
10 Five are fallen, one is, and the other is not yet come: and when he is
come, he must remain a short time. … Scripture reference –
11 And the
beast  which was and is not: the same also is the eighth, and is of
the seven, and goeth into destruction. … Scripture reference – Rev.:
12 And the ten horns which thou sawest are ten kings, who have
not yet received a kingdom: but shall receive power as kings, one hour
 after [with] the beast. … Scripture reference – Dan.: 7:24
13 These have one design: and their strength and power they shall deliver to the beast.
14 These shall fight with the Lamb. And the Lamb shall overcome them
because he is Lord of lords and King of kings: and they that are with
him are called and elect and faithful. … Scripture reference – Rev.:
19:16; 1Tim.: 6:15!
15 And he said to me: The waters which thou
sawest, where the harlot sitteth, are peoples and nations and tongues. …
Scripture reference –
16 And the ten horns which thou sawest in the
beast: These shall hate the harlot and shall make her desolate and naked
and shall eat her flesh and shall burn her with fire. … Scripture
reference – Rev.: 19:20; Dan.:7:11
17 For God hath given into their
hearts to do that which pleaseth him: that they give their kingdom 
to the beast, till the words of God be fulfilled. … Scripture reference –
18 And the woman which thou sawest is the great city which hath kingdom over the kings of the earth.  … Scripture reference –
meaning is that it will be revealed in due time. (mystery in Greek is
musterion, that is “revealed”). In the final ‘universal recapitulation
of evil’ (St. Irenaeus’ expression) the “woman” who is the “great
harlot” will be the recapitulation of all the diabolic, demonic,
gnostic, infidel, false religion of the world since Adam. In short,
today it is the Pan-heresy of the Ecumenical movement (utterly opposed
by Mortalium Animus, Pius XI, 1928), which is the culmination of
modernist Judeo-Mason blasphemy of: the True God and His Christ and the
Holy Spirit. This Pan-heresy is centered at Rome in the Vatican since 1958 especially, and has permeated all churches; this is the great apostasy that St.
Paul the Apostle warned us about (see: 2 Thess.2:3, 6, 7). He who holds
the great apostasy back (2 Thess: 2:6, 7) until the appointed time is
Jesus Christ Himself, according to St. Justin Martyr. The beast that the
woman rides is the world’s political-religious systems opposed to the
True God, the Trinity, Who is the Creator and Ruler over all. These
taken together are the precursor of the final beast of verse 11 which
includes all the former systems within it.
 -Ver. 11. The beast spoken of here seems to be the Roman Empire,
as in chapter 13. At the end of days it will be the final world system
opposing Christ and His Church. This world system will be, according to
the Church Fathers and Doctors of the Church, the one world empire of
the Antichrist who is the son of perdition, headquartered in the rebuilt
Solomonic temple in Jerusalem.
See 2 Thessalonians 2nd chapter. This is the ultimate Babylon and is utterly damned by Christ and His Church. “Such a secular, earthbound state [Israel]could easily become the political and military power base for theAntichrist when he comes. For the Antichrist will be in perfect accordwith the ideals of such a Zionist state. Moreover, the State of Israelhas demonstrated that it has the will and ability to go to war and winthe secular goals to which its heart is attached. Thus when theAntichrist comes to power as head of such an efficient, superblyequipped, scientific State, founded on nationalism, race and blood, hewill be able to conquer the rest of the world. He will be the first, theonly Jew to reign with political, economic, military power over thewhole world from his capital city, Jerusalem, the city in which Our Lordwas crucified” (Fr. Vincent Miceli, S.J., The Antichrist, p. 152).
 - Ver. 12. One hour: ten other kingdoms are allies of the beast and
battle against the Church. But their dominion is short; typified as an
hour. These occur at the same time and not in succession.
 - Ver. 17. The Greek text reads: “. . . to
do his purpose and to make common cause and to give their kingdom. . . :”
 - Ver. 18. …great city which hath kingdom over the kings of the earth.:
at the time that the Apocalypse was seen and recorded by St. John the
Apostle, that city was Rome, Italy, of the seven hills (1 – Janiculum
with the Vatican on the lower slope today, 2 – Aventine, 3 – Palatine
with the Capitoline and the Tiburtine oracle, 4 – Caelian, 5 –
Esquiline, 6 – Viminal, 7 – Quirinal), in the future it will be
Jerusalem of the seven hills (1 – The Citadel, 2 – Acra, 3 – Temple
Mount, 4 – Mount of Olives, 5 – Mt. Scopus, 6 – Mt Zion, 7 – Golgotha)
when the Antichrist rules from there. The eighth head which is a king
and has dominion over the kingdoms of the earth and therefore is
identified with that world wide (ecumenical in the narrow sense) kingdom
as well, was Caesar, in the days of ancient Rome.
Caesar was ruler over Rome, the Pontifex Maximus (head of all Roman
religion) and Princeps Senatus – first member by precedence of the Roman
Senate (therefore functional dictator without the title); and also the
Emperor (Imperator) over the Roman Empire. In the future the eighth head
ruling over Jerusalem and having world wide dominion for a short space will be the
Antichrist who will be a Jew - see: Antichrist will be a Jew. The exact arrangement of how that will be enacted is known to God.
Have nothing to do with the Antichrist and do not take the Mark of the Beast upon pain of eternal damnation in hell.