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Year 321 (CCCXXI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Crispus and Constantinus (or, less frequently, year 1074 Ab urbe condita). The denomination 321 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.

Contents

Roman Empire

  • Emperor Constantine I expels the Goths from the Danube frontier and repairs Trajan's Bridge. He leads an expedition into the old province Dacia (modern Romania) and makes peace with the barbarians.
  • March 7 - Constantine I signs legislation directing urban residents to refrain from work, and businesses to be closed, on the "venerable day of the Sun". An exception is made for agriculture.
  • Asia

  • Tuoba Heru launches a coup d'état against his cousin Tuoba Yulü, and becomes the new Prince of Dai.
  • Arts and sciences

  • Calcidius translates Plato into Latin.
  • Food and drink

  • Constantine I assigns convicts to grind Rome's flour, in a move to hold back the rising price of food in an empire whose population has shrunk as a result of plague (see 309 AD).
  • Religion

  • The Roman Catholic Church is allowed to hold property.
  • A synod in Alexandria condemns Arianism.
  • Births

  • Du Lingyang, empress of the Jin dynasty (d. 341)
  • Jin Chengdi, emperor of the Jin dynasty (d. 342)
  • Valentinian I, Roman emperor (d. 375)
  • Deaths

  • Tuoba Yulü, prince of the Tuoba Dai
  • References

    321 Wikipedia