Interesting. Of course we have a contingent of Catholics who lay claim to their church's assertions that Rome was the center of Christianity and responsible for giving us the Bible. In order to bolster that claim we see a jump to Luther and Calvin and Zwingli and given the opportunity, others, who held on to the Catholic traditions despite their reform leanings and protestations to truth as revealed in scripture. Can't blame them for that, they were deeply indebted to Roman education throughout their lives and weren't wholly converted overnight. Their protestant teachings developed over time, just as Catholic teachings did. What remained constant from the very beginning was scripture, despite the attempts of some to pervert and obliterate them altogether.
However. The center of early Christianity was not Rome. Early Christianity had to contend with a battle between two cities. Not Rome, but Antioch and Alexandria. Rome didn't come into the picture as a contender for the faith until after Constantine.
In saying no-one knew what the real gospels and the real epistles were as written by the apostles, that's nonsense. The original manuscripts were still around at the turn of the first century. Those manuscripts were faithfully translated into Syrian, and old Latin (itala) , and these were copied again and again meticulously and faithfully through out Christendom for the following centuries, and manuscripts of those copies still exist, and were used by such giants of the faith in their mission schools and colleges and translated into their own languages, like Lucian, Wulfilas, Columbanus, Aiden, Columba, and their students. Illiteracy was rampant indeed in Europe under the leadership of the priesthood of Rome, because it helped Rome of the peasants were kept in ignorance. To say that the Christians of the early centuries elsewhere had no Bible is wrong. The Celtic church, the Assyrian church, the Gauls, and the early Waldensians had the scriptures, and this from the second century. No-one had to wait for Constantine to publish his corrupted Bibles based on Alexandrian faulty manuscripts with the teachings of Clement, and the Gnostics such as Origen and his students interesting into the Vaticanus and Sinaitucus manuscripts that were used by Jerome, and the production of the Jesuit Douay, and 90% of the modern translations since, including the popular NIV, ESV, RSV, the Message, and the JW Bible.
The KJV, with it's foundation of the Antiochan line of over 5000 manuscripts is the only truly reliable Bible for Christians who desire the whole truth without the input of heretics and Catholic apologists.