After Allah raised Isa AS, Christianity split into three major strands: Gnosticism, a mystical understanding of the religion; Jewish Christians, who held themselves bound by the law of Musa AS (a halakha equivalent to shariah, including kosher law and circumcision) and believed Isa AS was the Promised Messiah sent to the Jews; essentially the Muslim belief; and Pauline Christians, following Paul, who was not a disciple of Isa AS but claimed to have seen him in a vision, taught that Isa AS had elements of divinity and had come to abolish the law of Musa AS, and introduced elements of the Trinity. For roughly 300 years Christians debated who Isa AS was: God, son of God, or prophet.
Before their own conversion, the Romans were pagan and were the fiercest enemies of the Christians, throwing them to lions and, under Emperor Nero, burning them alive to light the city of Rome. After some 200-300 years of martyrdom, Constantine became the first Roman emperor to convert to Christianity, a shock comparable to a modern head of state converting to Islam. Still carrying paganistic instincts, Constantine convened a council that, in 325 CE, decreed Pauline Trinitarian Christianity to be Rome's official religion, incorporating pagan elements such as 25th December, halos, and the Trinity, and persecuting the Unitarian and Jewish Christians who dissented. Pauline Christianity became the ancestor of the Orthodox, Catholic, and Protestant churches that make up the overwhelming majority of Christians today; Constantine is also said to have destroyed Christian books other than the four that supported his belief.
By the Prophet ﷺ's birth in 570 CE, only a handful of the original, non-Pauline Jewish Christians remained, such as the teachers who instructed Salman al-Farisi RA, explaining why they held knowledge not found in the New Testament and why Heraclius, decades later, could recognize the Prophet ﷺ from scriptures no longer in general circulation.
Nothing recorded for this event yet.