I, Caesar - Season 1 Episode 5 Constantine

Constantine revitalized a fading empire and built a glittering new capital that would stand for over 1,000 years. But his strongest legacy is religious; his conversion to Christianity put an end to hundreds of years of persecution and laid the foundations for Medieval Europe. His revolutionary policies – including re-organizing military and civil authority – place Constantine alongside Julius Caesar and Hadrian as among the most important emperors in the history of Rome. I, Caesar explores the rule of Constantine the Great, whose vision re-awakened an empire, and whose conversion changed history.