Diocletian /ˌd.əˈklʃən/ (Laitin: Gaius Aurelius Valerius Diocletianus Augustus), born Diocles, (245–311)[3][5] wis a Roman emperor frae 284 tae 305.

Istanbul - Museo archeol. - Diocleziano (284-305 d.C.) - Foto G. Dall'Orto 28-5-2006.jpg
Laureate heid o Diocletian
51st Emperor o the Roman Empire
Ring20 November 284 – Julie 285 (in competeetion wi Carinus)
July 285 – 1 Aprile 286 (alone)
1 Aprile 286 – 1 Mey 305 (as Augustus o the east, wi Maximian as Augustus o the wast)[1]
SuccessorConstantius Chlorus an Galerius
Bornc. 22 December 244[2]
Salona (nou Solin, Croatie)
Dee'd3 December 311 (aged 66)[3]
Aspalathos (nou Split, Croatie)
BuirialDiocletian's Palace in Aspalathos. His tomb wis later turned intae a Christian kirk, the Cathedral o St. Domnius, which is still staundin within the palace at Split.
Full name
Diocles (full name unkent) (frae birth tae accession);
Caesar Gaius Aurelius Valerius Diocletianus Augustus (as emperor)[4]


  1. Barnes, New Empire, 4.
  2. Barnes, New Empire, 30, 46; Bowman, "Diocletian and the First Tetrarchy" (CAH), 68.
  3. 3.0 3.1 Barnes, "Lactantius and Constantine", 32–35; Barnes, New Empire, 31–32.
  4. Barnes, New Empire, 4. For full imperial titulature, see: Barnes, New Empire, 17–29.
  5. New Empire, 30, 46; Bowman, "Diocletian and the First Tetrarchy" (CAH), 68.