380

Events

January/February – Emperor Theodosius I is baptized.
February 27 – Theodosius I, with co-emperors Gratianus and Valentinian II, declare their wish that all their peoples convert to trinitarian Christianity, in accordance with the patriarchs of Rome and Alexandria, implicitly rejecting the Arianism of the patriarch of Constantinople as heretical.
November 24 — Theodosius I makes his adventus, or formal entry, into Constantinople.
Bedouin Queen Mavia's Saracen troops defeat a Roman army.
Invasion of the Vandals: Gratian is forced to cede Upper Pannonia to them.

The annexation of western provinces by Gupta give him control over commerce with Europe and Egypt.

The Vulgate, a translation in Latin of the Bible by St. Jerome, is published.
St. Gregory Nazianzus orders the burning of all known copies of Sappho's poetry.
Tyconius writes a commentary on the Bible's Book of Revelation.
A cathedral is built in Trier, Germany.
The Council of Saragossa is held.
Saint Ambrose introduces popular music into church services.