Definition
Theodosius can refer to several historical figures, most notably Theodosius I. He was Roman Emperor from 379 to 395 AD. Theodosius I is significant for making Christianity the state religion of the Roman Empire. He suppressed paganism and played a role in shaping early Christian doctrine. Think of him as a leader who dramatically shifted the cultural and religious landscape. Other Emperors named Theodosius followed, but Theodosius I's legacy is most impactful.