380s

Millennium:	1st millennium
Centuries:	3rd century – 4th century – 5th century
Decades:	350s 360s 370s – 380s – 390s 400s 410s
Years:	380 381 382 383 384 385 386 387 388 389
Categories:	Births – Deaths – Architecture; Establishments – Disestablishments

Below are some of the important events that happened between 380 and 389.

380

January or February – Emperor Theodosius I is baptized.
February 27 – Edict of Thessalonica: Theodosius I, with co-emperors Gratian and Valentinian II, say that all Roman citizens should become Christians.
The Rock of Cashel is built in Ireland.
The Visigothic chieftain Fritigern dies. His rival Athanaric becomes king of the entire Gothic nation.

Roman Emperor Gratian moves the capital to Mediolanum (modern Milan).
The Visigothic chieftain Athanaric becomes the first foreign king to visit the East Roman capital of Constantinople.
Flavian succeeds Meletius as Patriarch of Antioch.
Timothy succeeds Peter as Patriarch of Alexandria.

Niall of the Nine Hostages becomes the first High King of Ireland.
Hadrian's Wall is overrun by the Picts.
January 19 – Arcadius becomes Roman Emperor.
Roman troops in Britain call Magnus Maximus Emperor. He crosses over to the continent and makes Trier his capital.
King Ardashir II dies after a 4-year reign. He is succeeded by his son Shapur III.

Magnus Maximus returns to Britain to help them with the Barbarians raids.
An edict of Theodosius I closes pagan temples in the Nile Valley.
King Shapur III signs a treaty with Theodosius I. Armenia is divided in two kingdoms.
December 17 – Pope Siricius succeeds Damasus I as the 38th pope.

Jinsa of Baekje becomes the 16th king of the ancient Korean kingdom of Baekje.
Copper extraction and casting begins in the mines of Kansanshi in southernmost Africa.
Ammianus Marcellinus begins writing a history covering the years 96 to 378.
The Serapeum in Alexandria is destroyed.
Aurelios Zopyros becomes the last reported athlete at the Ancient Olympic Games.

Spring – Emperor Theodosius I increases the taxes in Antioch. The peasants start a riot.
Magnus Maximus invades Italy. Emperor Valentinian II, age 16, is forced out of Rome.
Winter – Emperor Theodosius I takes Valentinian II into protection.

Battle of the Save: Emperor Theodosius I defeats Magnus Maximus near Emona.
Valentinian II is restored as Roman Emperor.
August 28 – Magnus Maximus surrenders at Aquileia and is executed.
Bahram IV becomes the twelfth Sassanid king of Persia.
Emperor Chandragupta II, ruler of the Gupta Empire, begins a war against the Shaka Dynasty in West India.

All pagan buildings in Alexandria are destroyed by fire. This includes the library.

Millennium:	1st millennium
Centuries:	3rd century – 4th century – 5th century
Decades:	350s 360s 370s – 380s – 390s 400s 410s
Years:	380 381 382 383 384 385 386 387 388 389
Categories:	Births – Deaths – Architecture Establishments – Disestablishments