Ok, so the OTL story goes that the day before a big battle Constantine claimed that in a vision he saw a symbol in the sky, and interpreted that symbol to be telling him to convert to Christianity. Well he does so, wins the battle, conquers the western empire, and legalizes christianity and makes it the official religion. Now of course there are plenty of people claiming Constantine's real reason for converting to and legalizing Christianity was for political reasons.
For the sake of argument let's say that everything he did IOTL was sincere. Now, what if he didn't have that vision? What if he didn't decide to convert to Christianity and legalize the religion? What becomes of Christianity? What about Judaism, or any of the other religions of the empire? Does this prolong the empire's existence, or hasten it's downfall?
For the sake of argument let's say that everything he did IOTL was sincere. Now, what if he didn't have that vision? What if he didn't decide to convert to Christianity and legalize the religion? What becomes of Christianity? What about Judaism, or any of the other religions of the empire? Does this prolong the empire's existence, or hasten it's downfall?