Pope Innocent I dies. According to Jerome, one of his contemporaries, Pope Innocent I was actually the son of his predecessor, Pope Anastasius I. There's no clear evidence for this, but Jerome was in a position to know. Regardless, Innocent I was pope at a very important time in history: the sack of Rome in 410 by Alaric I, the Visigoth king.
Fortunately for the church Alaric was a Christian. His Visigoths caused significant destruction throughout Rome, but they spared Christian buildings and made and extra effort to wreck pagan temples. This seemed like the end of the world for the citizens of Rome, but it was a great opportunity for Pope Innocent I to expand his power and influence by launching a massive rebuilding and charity movement.
Theologically, Pope Innocent I made a contribution to the eventual development of papal supremacy by arguing that all doctrinal questions or disputes should be brought before the pope for final judgment. This made the pope the last word on matters of theology, doctrine, dogma, interpretation, etc.