
Theodosius I
347 — 395 · Feast day: January 17
The last emperor to rule both halves of the Roman Empire, Theodosius established Nicene Christianity as the official state religion with the 380 Edict of Thessalonica and confirmed its orthodoxy at the First Council of Constantinople in 381. A capable general who ended the Gothic War and defeated two usurpers, he is remembered in Christian tradition above all for submitting to public penance imposed by St. Ambrose after ordering the Massacre of Thessalonica in 390.
