Who Was Alive

Were Diocletian and Helena, mother of Constantine I alive at the same time?

Yes. Diocletian and Helena, mother of Constantine I were alive at the same time, from c. AD 250 to AD 316.

Diocletian

Diocletian

Roman emperor

Born 240s · died 3 December AD 316

Helena, mother of Constantine I

Helena, mother of Constantine I

Roman politician

Born c. AD 250 · died 18 August AD 330

  1. Plotinus, AD 205 – AD 270
  2. Aurelian, AD 214 – AD 275
  3. Diocletian, 240s – AD 316
  4. Helena, mother of Constantine I, c. AD 250 – AD 330
  5. Constantine the Great, c. AD 272 – AD 337
  6. Saint George, AD 275 – c. AD 303
  7. Athanasius of Alexandria, AD 296 – AD 373
  8. Basil of Caesarea, AD 329 – AD 379

Diocletian and Helena, mother of Constantine I in bold, with some of their best-known contemporaries; dashed lines mark world events. Drag across, or use the arrow keys, to see the age each reached in any year. Faded ends mark uncertain dates.

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Events both lived through

Where Diocletian and Helena, mother of Constantine I were born

Diocletian and Helena, mother of Constantine I are labelled, with the contemporaries on the timeline. Each dot is a birthplace from Wikidata (8 of 8 placed); tap one to open that person.
Birthplaces as a list