The excavation of an ancient Roman city has rewritten the history of the Empire's collapse ... the River Liri between the late first century BCE and the fourth century CE, Popular Mechanics ...

We now have, Paul says, a new map of the ... by the end of the fourth century it is illegal to do any form of public worship other than Christianity in the entire Roman Empire.

Christianity was made the official religion of the Roman Empire by the Emperor Constantine in the 4th century AD. Before then, Christians got into trouble because they refused to worship the ...