Event Early Tetrarchic Period

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The Tetrarchy was the system instituted by Roman emperor Diocletian in 293 AD to govern the ancient Roman Empire by dividing it between two emperors, the augusti, and their junior colleagues and designated successors, the caesares. This marked the end of the Crisis of the Third Century.

Chronology

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  • January 294: In 293, feeling more focus was needed on both civic and military problems, Diocletian, with Maximian's consent, expanded the imperial college by appointing two Caesars.
  • January 286: The first phase of the Tetrarchy, sometimes referred to as the Diarchy ('the rule of two'), involved the designation of the general Maximian as co-emperor of Diocletian.
  • January 286: The first phase of the Tetrarchy, sometimes referred to as the Diarchy ('the rule of two'), involved the designation of the general Maximian as co-emperor of Diocletian.
  • January 294: In 293, feeling more focus was needed on both civic and military problems, Diocletian, with Maximian's consent, expanded the imperial college by appointing two Caesars.