What we do know is that Christianity spread throughout the Roman world like a wildfire. By the time of Paul’s arrest it had already reached ROME.
The Christians were not really subjected to much scrutiny until the reign of Nero (54-68 AD) who started persecuting Christians as scapegoats for his own incompetence and decadence.
After the Apostle Peter’s crucifixion, not much was recorded by the early church because of persecutions and fear of being discovered.
Some emperors were hostile to Christians, some indifferent and some supportive, like Constantine, the first Christian Roman emperor.................
you guys might like the movie Quo Vadis