317 CE

Emperor Constantine the Great and co-emperor Licinius elevate their sons Crispus, Constantine II and Licinius II to Caesars. After this arrangement Constantine rules the dioceses Pannonia and Macedonia, and establishes his residence at Sirmium, from where he prepares a campaign against the Goths and Sarmatians. Sixteen Kingdoms: Jingwen (later Yuan of Jin) flees with remnants of the Jin court and noble families to the south. He succeeds Emperor Min of Jin as first ruler of the Eastern Jin Dynasty and decides to make Jiankang (modern Nanjing) his new capital. The earliest historically verified reference to tea is recorded, although the Chinese have been drinking the beverage for centuries.

In the 310s, the 4th century.

Conflict & Security

  • Sixteen Kingdoms: Jingwen (later Yuan of Jin) flees with remnants of the Jin court and noble families to the south. He succeeds Emperor Min of Jin as first ruler of the Eastern Jin Dynasty and decides to make Jiankang (modern Nanjing) his new capital.source

Religion & Belief

  • March 1 – Emperor Constantine the Great and co-emperor Licinius elevate their sons Crispus, Constantine II and Licinius II to Caesars. After this arrangement Constantine rules the dioceses Pannonia and Macedonia, and establishes his residence at Sirmium, from where he prepares a campaign against the Goths and Sarmatians.source
  • Licinius recognizes Constantine I as senior emperor and executes Valerius Valens.source

Technology & Infrastructure

  • The earliest historically verified reference to tea is recorded, although the Chinese have been drinking the beverage for centuries.source

Births

  • August 7 – Constantius II, Roman emperor (died 361)source
  • Fú Jiàn, Chinese emperor of the Former Qin (died 355)source
  • Themistius, Byzantine statesman and philosophersource
  • Junius Bassus Theotecnius, Roman politician (died 359)source

Deaths

  • Valerius Valens, Roman emperorsource