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|370 by topic|
|Ab urbe condita||1123|
|Balinese saka calendar||291–292|
|Chinese calendar||己巳年 (Earth Snake)|
3066 or 3006
— to —
庚午年 (Metal Horse)
3067 or 3007
|- Vikram Samvat||426–427|
|- Shaka Samvat||291–292|
|- Kali Yuga||3470–3471|
|Iranian calendar||252 BP – 251 BP|
|Islamic calendar||260 BH – 259 BH|
|Minguo calendar||1542 before ROC|
|Seleucid era||681/682 AG|
|Thai solar calendar||912–913|
496 or 115 or −657
— to —
497 or 116 or −656
Year 370 (CCCLXX) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Valens (or, less frequently, year 1123 Ab urbe condita). The denomination 370 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- The Germanic Invasions took place. The German peoples surrounded the north borders of the Roman empire while the Huns were destroying everything in their path--villages, cities, even empires.
- A law of Valentinian I and Valens bans marriages between Romans and barbarians under penalty of death.
- An edict issued by Valentinian I and Valens bans the importation of wine and olive oil from areas controlled by the barbarians.
- The Huns migrate westward from the Volga into Europe, and subjugate the Alans and the Ostrogoths. With their arrival, a tradition of composite bows is introduced.
- Athanaric, Gothic leader of the Tervingi, advances eastwards and takes up a defensive position along the banks of the Dniester (Romania).
- Basil the Great becomes bishop of Caesarea (Cappadocia).
- Demophilus of Constantinople becomes Patriarch of Constantinople, although his position is disputed by Evagrius of Constantinople.
- John Chrysostom is baptized.
- Alaric I, king of the Visigoths (d. 410)
- Saint Brice, bishop of Tours (d. 444)
- Hypatia, female mathematician and philosopher (approximate date)
- Eudoxius of Antioch, Patriarch of Constantinople
- Lucifer Calaritanus, founder of the Luciferian sect (approximate date)
- Imperatores Valentinianus, Valens, Gratianus . Ad barbaricum transferendi vini et olei et liquaminis nullam quisquam habeat facultatem ne gustus quidem causa aut usus commerciorum. * VALENTIN. VALENS ET GRAT. AAA. AD THEODOTUM MAG. MIL.
- "Alaric - leader of Visigoths". Encyclopedia Britannica. Retrieved January 5, 2018.