Who Was Alive

Were Diocletian and Constantine the Great alive at the same time?

Yes. Diocletian and Constantine the Great were alive at the same time, from c. AD 272 to AD 316.

Diocletian

Augustus of the Eastern Roman Empire

Born 240s · died 3 December AD 316

Constantine the Great

Roman emperor from 306 to 337 and first to convert to Christianity

Born c. AD 272 · died 22 May AD 337

  1. Plotinus
  2. Diocletian
  3. Constantine the Great
  4. Saint George
  5. Basil of Caesarea
  6. Julian
Diocletian and Constantine the Great in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.