340s
Millennium: | 1st millennium |
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Events
340
By place
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.[1]
- 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.
By topic
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.
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Significant people
- Constans, Roman Emperor
- Constantius II, Roman Emperor
- Flavius Philippus, praetorian prefect of the East, consul
- Hypatia of Alexandria
Births
- Flavius Theodosius, better known as Theodosius I. Born in 347, he would eventually become a Roman emperor.
Deaths
- Constantine II, Roman emperor. Died in 340.