The Beast is the heart of spiritual Babylon.
The Apostle Peter, while in Rome, referred to Rome as Babylon.
The church that is at Babylon, elected together with you, saluteth you; and so doth Marcus my son.
1 Peter 5:13. (nearly all scholars agree that Peter was at Rome when he wrote this and used "Babylon" to refer to Rome in this instance)
Q: But Why?
A: Despite various reasons given by scholars as to why Peter may have done this, Genesis to Revelation is inter-connected under surface as veins of gold beneath the ground. Obviously the hand of the Holy Spirit guided him as it impressed him to write this.
The Little Horn entity rose up out of pagan Rome and that Beast entity that it is, is still in literal Rome to this day because it is one and the same.
(Peter gave you a clue)
"... the supra-metropolitan organization which resulted in the formation of
the first Patriarchates of Rome, Alexandria and Antioch, owes its
origin, not to the apostolic foundation of these cities, but to the fact
that they were the most important cities of the Empire, the capitals of
groups of provinces.
Rome was more privileged in this way, because it
was the capital of the Empire and the residence of the Emperors.
Owing
to the intimate connection of all Italian cities with the city of Rome
by which they were regarded only as municipia, the Bishops of the
capital of Italy and of the Empire were able to preserve direct
jurisdiction over the whole of Italy, without the intermediary of the
Metropolitans of the provinces, into which Italy was subdivided.
The prestige of the Roman Bishop in Gaul, Africa, Spain, and
Illyricum was great from the beginning, however, thanks not only to the
circumstance that many of the first missionaries there came from Italy
and Rome, and that Rome was the center of the Empire and the official
residence of the Emperors, but also because of the veneration in which
young Christian communities in the West held St. Peter,..., whose successors the
Bishops of Rome claimed to be.
When, however, Constantinople became the residence of the Emperors, it
seemed necessary to lay more stress on the Apostolic and Petrine
character of the Roman See. From the middle of the fourth century on,
the Roman See was often called in the West, simply the See of Peter, and
this use became general also in Rome during the time of Pope Damasus
(336-89) who emphasized further the apostolic character of his See,
calling it simply: sedes apostolica. From that time on, this usage became a general rule not only in Rome, but also in the whole of the West."
FrancisDvornik/CatholicCulture