The Theodosian Emperors were a series of Roman rulers from the late 4th to early 5th centuries, named after Theodosius I, who reigned from 379 to 395 AD. This dynasty is notable for its efforts to solidify the Christian faith within the Roman Empire, making it the official religion and suppressing pagan practices. Following Theodosius I, his sons Arcadius and Honorius ruled the Eastern and Western Roman Empires, respectively. The period was marked by increasing challenges, including invasions by various tribes and internal strife, leading to the eventual decline of the Western Roman Empire.