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Roman Empire
Constantinople, capital of Emperor Constantius II, becomes the largest city in the world, taking the lead from Rome, capital of his brother Constans I.
Constantine II, Emperor of the central part of the Roman empire (the upper Danube, Italy and middle Africa), crosses the Alps and attacks the army of his brother Constans I, emperor of the western part of the Roman Empire (Britain, Gaul, the Rhine provinces and Iberia). They clash at Aquileia in northern Italy. Constantine is killed in a skirmish by an ambush of Constans' troops.
Constans is left sole ruler of the Western Roman Empire, with his other brother, Constantius II, Emperor of the Eastern Roman Empire.
Religion
Pope Julius I inveighs against Arianism at the Council of Rome.
Acacius succeeds Eusebius as bishop in the see of Caesarea.
Wulfila spreads evangelism among the Goths for 7 years.
Roman Empire
Emperor Constans I bans pagan sacrifices and magic rituals under penalty of death.
Constans I begins a successful campaign against the Franks.
India
Samudragupta, ruler of the Gupta Empire, extends during a decade his kingdom and his influence over most of India. A pillar found at Allahabad sings his praises.
Religion
The Council of Encaenia is held in Antioch.
Paul I is restored as Patriarch of Constantinople.
Thousands of Christians are executed at Seleucia in Mesopotamia.
Coptic Christianity is introduced into Ethiopia by the Syrian apostle Frumentius. He and his colleague Edesius were captured by Ethiopians a year or two ago, and have become civil servants at the Aksumite court of King Ezana. Frumentius becomes the first Bishop of Axum and encourages the Christian merchants present in the country to practise their faith openly.
Roman Empire
The Western Roman Emperor Constans campaigns in Britain against the Picts.
Constans campaigns victoriously against the Franks.
The senate abolishes gay marriage.
= Europe =
A large earthquake strikes Cyprus.
Asia
Goguryeo is invaded by Murong Huang of the Xianbei.
Jin Kangdi succeeds his brother Jin Chengdi as emperor of China.
Religion
Paul I, Patriarch of Constantinople, is deposed and replaced by Macedonius I.
February 15 – The original Hagia Sophia is dedicated in Constantinople.
Roman Empire
The Western Roman Emperor Constans I is in Britain, possibly in a military campaign against the Picts and Scots.
The Eastern Roman Emperor Constantius II campaigns in Adiabene, a vassal kingdom of Armenia (Persian Empire).
Religion
Pope Julius I tries to unite the Western bishops against Arianism by convoking the Council of Sardica (later Sofia), which acknowledges the pope's supreme authority and grants him the right to judge cases involving the legal possession of episcopal sees, but only Western and Egyptian bishops attend, and Arianism remains strong.
Roman Empire
The Eastern Roman Emperor Constantius II campaigns in eastern Mesopotamia against the Sassanid Persians
Battle of Singara: The Roman army under Constantius wins a close victory at the strongly fortified city of Singara (Mesopotamia). His enemy, King Shapur II, is forced to lift the siege and withdraw the Persian army.
Shapur II besieges for the second time the Roman fortress of Nisibis in eastern Mesopotamia, but is repulsed by forces under the general Lucilianus.
China
Jin Mudi, age 1, succeeds his father Jin Kangdi as emperor of China. His mother Empress Dowager Chu, becomes the ruling authority at court and serves as regent.
Art
The making of a detail of Admonitions of the Imperial Instructress to Court Ladies (attributed to Gu Kaizhi and being from the Six Dynasties period) begins (approximate year) and is completed in 406. It is now kept at the British Museum, London.
Religion
Bishop Eustorgius I brings relics of the Three Magi from Constantinople to Milan, according to a 12th century legend.
India
The merchant Knai Thomman visits the Malabar Coast in Kerala (India) and assists the church there.
Asia
In Korea, the Buyeo Kingdom is absorbed by Goguryeo.
Religion
Emperor Constans I uses his influence to secure the return of Athanasius. He is restored as Patriarch of Alexandria, and documents are compiled relating to his expulsion, under the title Apology Against the Arians.
Macedonius I, Patriarch of Constantinople, is deposed again by Paul I.
Julius Firmicus Maternus writes De erroribus profanarum religionum.
The Visigoths are converted to Arianism by Wulfila.
China
Li Shi, ruler of Cheng Han, fails in his attempt to halt a Jin expedition under Huan Wen. He flees to the capital Chengdu and surrenders his forces. Emperor Jin Mudi spares his life and makes him a marquess.
Religion
Council of Sardica: An attempt is made to resolve the Arian controversy, and ground rules for bishops are laid down.
The Council of Philippopolis is held as the result of Eastern bishops leaving the Council of Sardica. In Philippopolis (Bulgaria), they excommunicate Pope Julius, and as a result, the Arian controversy is perpetuated.
Europe
Wulfila escapes religious persecution by the Gothic chieftain Athanaric, and obtains permission from Constantius II to migrate with his flock of converts to Moesia and settle near Nicopolis ad Istrum (Bulgaria).
Asia
In Persia, women are enrolled in the army to perform auxiliary services.
In India, Samudragupta of the Gupta Empire defeats Rudrasena in battle.
Bangalore
Emperor Shi Zun dies after a brief reign of 183 days; he and his mother Empress Zheng Yingtao are executed. His son Shi Jian succeeds him as emperor of the Jie state Later Zhao.
The Mou-jong (proto-Mongols) take control of North China.
Constans, Roman Emperor
Constantius II, Roman Emperor
Flavius Philippus, praetorian prefect of the East, consul
Hypatia of Alexandria
Flavius Theodosius, better known as Theodosius I. Born in 347, he would eventually become a Roman emperor.
Constantine II, Roman emperor. Died in 340.
340s Wikipedia (Text) CC BY-SA
