Important Historical Events of the year 380, Year 380 in History

List of 380 Major News Events in History, Most Important Historical Events in 380

What happened in the year 380?

Date Event
February 27, 380 Edict of Thessalonica: Emperor Theodosius I and his co-emperors Gratian and Valentinian II declare their wish that all Roman citizens convert to Nicene Christianity.
November 24, 380 Theodosius I makes his adventus, or formal entry, into Constantinople.