Borrowing from Stephen Hawking, here is a "A brief history of Time":
It actually started in the first Century. First signs of pagan Christianity appeared in Israel. There was Hellenistic Church constructed complete with a mosiac of Christ represented as Helios in a mosaic on the floor. Even the use of images is alien to Hebraic Christianity, particularly with the prohibition in the Ten Commandments.
Things came to a head with Emperor Constantine, who sees a cross in the sky and hears a voice saying, "By this sign you shall conquer". Actually a cross is a pagan symbol. There is no where in the Greek manuscripts of the new testament is the cross found. A two beam member has been etched into our minds due to 2000 years of Pagan Christianity reigning as prophesied in the Revelation. Constantine remained a pagan until his death bed, despite calling the Council of Nicea in the 4th Century A.D., which established the bases of Pagan Christianity as we know it today.
The Trinity was a concept alien to Hebraic Christianity and even to gentile Bishops, scattered throughout the Empire, However Athanansius, a Bishop of Antioch, convinced the council of this pagan concept. Athanansius was a practitioner of Asiatic Trinitarian cults prior to becoming a Christian Bishop. At this time Gnostic contemplations of the Demiurge and the Logos were synthesized in the Roman Greek Christology. One wayward manuscript was recently uncovered in Egypt, entitled, the Gospel of Judas. Rome and Constantinople are ground zero as founts for the proliferation of the Pagan Christianity as prophesied, Christian Roman Empire being represent in the Book of Revelation as a Beast that looked like a lamb with two horns but spoke like a dragon. The two horns are the cities, Rome and Constantinople, seats of Empire and Religious apostasy. And both cities sit on seven hills as revealed in the prophecy. The pope has the title Pontifex Maximus, the title assign to Emperors which originates from Mithraism and the Babylonian Mysteries traditions.Pope wears the Miter Hat which come from worship of the God Dagon.
The Basilica is adorn with a Pantheon of Saints to replace the Roman Pantheon of Gods. Whereas Rome had gods from ever thing from wine on down, these attributes were quickly attributed to the new Roman Saints. This Paganism and Mithraism redressed in the guise of Christianity. "Babylon the Mysterious, mother of Harlots and of every abomination upon the earth ...the whole world had drunken from the cup of her abominations and the fierceness of her fornications" These cities are the Harlot riding the scarlet Beast in these prophecies. This is because she is drunk with the blood of the saints, as prophesied. The Coliseum in Rome typified her drinking cup where thousand of true Christians were slaughtered and fed to the lions. This blasphemous edifice even stands to this very day as witness to the atrocities that the Beast of Rome and Contantinople waged against the truth. Being drunk with the blood of the Saints, God has sent her strong spirits of Delusion such that she now presents herself as the fount of Christianity. whereas in true she is the very fount of apostasy long ago heralded in the prophecies. Look to the Court yard of the Vatican and there is the Obelisk, the standing image, that cause Israel to go into captivity when it was erect in front of the temple in Jerusalem. This is also the origin of church spires and steeples. And combined with the Constantine Cross, and Mithraism Holidays, Christmas (Jews didn't celebrate birthdays, nor winter festivals coinciding with the winter solstice, or the Venereal Equinox, Easter, which come from the babylonian God Isthar, Astarte.
For nearly a thousand years this Beast has spiritually dominated Europe and Russia despite the original empire fragmenting into Kingdoms, though Byzantium, Constantinople, empire east, last until the 13th Century. These two horns, cities remain the seats of apostasy. Both Europe and Russia fall under the auspices of the the Latin Rite and the Orthodox Rite. And as recently as 2007 both Rites have acknowledged the primacy of the Bishop of Rome. This is an ominous sign of the great apostasy and deception to come as the Beast that looked like a lamb but spoke like a dragon blows life into the Imperial Roman Empire. This genesis is in process as we speak as the EU pushes eastward. Turkey is at its footsteps and Russia may be assimilated this Century.