I'll Let scripture teach you:
Mystery Babylon = JERUSALEM/APOSTATE ISRAEL
Mystery Babylon the Mother of Harlots is described by scripture as none other than Jerusalem and Apostate Israel, with her record of violence against all the righteous prophets. The bible clearly identifies her as Jerusalem and Apostate Israel.
Let's let scripture interpret scripture for a minute:
MYSTERY BABYLON
Rev. 18:24
And in her was found
the blood of prophets...
JERUSALEM
Matthew 23:37
O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee...
Luke 13:33
...
for it cannot be that a prophet perish outside of Jerusalem.
MYSTERY BABYLON
Revelation 18:22-23
...and the sound of a
millstone shall be heard no more at all in thee; And the
light of a candle shall shine no more at all in thee; and the
voice of the bridegroom and of the bride shall be heard no more at all in thee: for thy merchants were the great men of the earth; for by thy sorceries were all nations deceived.
JERUSALEM
Jeremiah 25:10-11
Moreover I WILL TAKE FROM THEM the voice of mirth, and the voice of gladness,
the voice of the bridegroom, and the voice of the bride, the sound of the millstones, and the light of the candle. And this whole land shall be a desolation, and an astonishment;
MYSTERY BABYLON
Revelation 18:10
Standing afar off for the fear of her torment, saying, Alas, alas, that
GREAT CITY Babylon, that mighty city! for in one hour is thy judgment come.
JERUSALEM
Revelation 11:8
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. [our Lord died in Jerusalem, of course]
MYSTERY BABYLON -- CLOTHED IN PRIESTLY GARMENTS OF AARONIC PRIESTHOOD
Revelation 17:4, 18:16
And
the woman was arrayed in purple and scarlet colour, 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 saying, Alas, alas, that great city, that was clothed in
fine linen, and purple, and scarlet, and decked with gold, and precious stones...
PRIESTLY GARMENTS OF AARONIC PRIESTHOOD
Exodus 28:4-6, 17-20
they shall make holy garments for Aaron thy brother, and his sons, that he may minister
unto me in the priest's office.
And they shall take gold, and blue, and purple, and scarlet, and fine linen. And they shall make the ephod of gold of blue, and of purple, of scarlet, and fine twined linen, with skillful work....And thou shalt take
two onyx stones, and grave on them the names of the children of Israel...
Exodus 28:17 And thou shalt set in it settings of stones, even four rows of stones:
the first row shall be a sardius, a topaz, and a carbuncle: this shall be the first row. And the second row shall be an emerald, a sapphire, and a diamond. And the third row a ligure, an agate, and an amethyst. And the fourth row a beryl, and an onyx, and a jasper: they shall be set in gold in their inclosings...
JERUSALEM
Jeremiah 4:30
Though thou clothest thyself
with crimson, though thou deckest thee with ornaments of gold, though thou rentest thy face with painting, in vain shalt thou make thyself fair; thy lovers
MYSTERY BABYLON
Revelation 17:5
And upon her
forehead was a name written, MYSTERY, BABYLON THE GREAT,
THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.
JERUSALEM
Jeremiah 3:1
but thou hast played
THE HARLOT with many lovers; yet return again to me, saith the LORD.
Jeremiah 3:3
and thou hadst a w-hore's forehead...
Ezekiel 16:35-36
Wherefore, O harlot, hear the word of the LORD: Thus saith the Lord GOD; Because thy filthiness was poured out, and thy nakedness discovered through thy whoredoms with thy lovers, and with all the idols of thy ABOMINATIONS, and by the blood of thy children, which thou didst give unto them;
MYSTERY BABYLON
Revelation 18:20
Rejoice over her, thou heaven, and ye holy apostles and prophets;
for God hath avenged you on her.
JERUSALEM/APOSTATE ISRAEL
Luke 11:47
Woe unto you! ... Therefore also said the wisdom of God, I will send them prophets and apostles, and some of them they shall slay and persecute:
THAT THE BLOOD OF ALL THE PROPHETS, which was shed from the foundation of the world, may be required of this generation; From the blood of Abel unto the blood of Zacharias, which perished between the altar and the temple: verily I say unto you, IT SHALL BE REQUIRED of this generation.
The cross references in Holy Scripture are so abundant as to leave us without any doubt who is Mystery Babylon --
JERUSALEM AND APOSTATE ISRAEL.
Jerusalem is the Great City in the book of Revelation (Rev 11:8). She is Babylon (1 Pet 5:12-13), the Harlot that rode on the Beast's back (her alliance with Ancient Rome) before the Beast turned on her and made her desolate and burned her with fire (Rev 17:16; Lk.21:20).
Earthly Jerusalem, by Divine right and calling, was the preeminent city among all nations. The Hebrew/Biblical understanding of Jerusalem is that she is the "Chief of the nations" (
Jeremiah 31:7; Ez 5:5), the Queen city of the earth (Lam 1:1/Rev 18:7). She, by Divine right and covenant, was appointed as the head of all nations (Deut 26:19; Deut 15:6; Deut 28:1,10-13), and the gentile kings recognized God's dwelling was at Jerusalem with the Hebrews (1 Ki 10:24;
Luke 11:31;
Ezra 1:2; Dan 2:47, 3:28-29, 4:1-3, 4:17, 4:34-37;
Ezra 1;
Ezra 4-7;
Ezra 7:15,23).
The Governor of all nations (Ps. 22:28) lived in Jerusalem in his House (Ez 7:15,23), and all the kingdom, power and might over earth was His (1 Chron 29:11-12). Indeed, all kings receive their power to rule from that Divine King (Rom 13:1-2,6;
John 19:11; 1 Pet 2:13-14,17; Ez 1:2; Dan 1:1-2; Dan 2:20-21; Dan 2:37-38; Dan 2:47, Dan 3:28-29; Dan 4:1-3,17,34-37.).
Yet, Jerusalem was also famous for becoming The Harlot City -- an unfaithful spouse to her King (Isa 1:21; Jer 3:6-10; Ez 16:37-39). She had become "drunk with the blood of the saints" (Rev 17:6; Rev 18:20,24; 1 Thess 2:15-16) as Christ had prophesied she would (Mt 23:33-37; Lk 11:50-51).
Sadly, the "great city," Jerusalem (Rev 11:8), had fallen, and had become the habitation of demons and a cage of every unclean and hateful bird (Rev 18:2). The Queen City Jerusalem (Rev 18:7/Lam1:1), which had been great among the nations (Lam 1:1), had become a widow (Rev 18:7/Lam1:1). And She, having become an unfaithful Harlot to God, was thus "burned with fire" (Rev 18:8/17:16) as her covenant law demanded for her (Lev 21:9). The blood of all the apostles and prophets who she famously killed (Matt 23:33-36; Matt 21:34-39; Lk 13:33; Acts 7:52; 1 Thess 2:15-16; Lk 11:47; Neh 9:26; 1 Ki 19:14) was avenged upon her (Matt 23:33-37; Rev 16:6; Rev 18:20,24; 1 Thess 2:15-16).

A great suggestion, and I was happy to oblige.