Diocletian's Reforms and the Establishment of the Tetrarchy (284–305 CE)

1. Diocletian acclaimed emperor by eastern army

   Nov 17, 28405Labels: Diocletian, Eastern Army

   • Britannica

2. Diocletian becomes sole ruler after Carinus’ death

   Jan 1, 28507Labels: Diocletian, Carinus

   • Britannica

3. Maximian appointed to share imperial power

   Jan 1, 28507Labels: Diocletian, Maximian

   • Maximian

4. Maximian recognized as Augustus in the West

   Jan 1, 28604Labels: Maximian, Western Empire

   • Maximian

5. Administrative division into provinces and dioceses expanded

   Jan 1, 29301Labels: Provinces, Dioceses

   • Diocletian
   • Illyricum

6. Constantius and Galerius appointed Caesars

   Jan 1, 29303Labels: Constantius Chlorus, Galerius

   • Constantius
   • 293

7. Major coinage reform introduces argenteus and follis

   Jan 1, 29401Labels: Argenteus, Follis

   • Argenteus
   • CoinWeek

8. Edict on Maximum Prices issued to curb inflation

   Jan 1, 30101Labels: Edict on, Diocletian

   • Britannica
   • Price Edict

9. Diocletian abdicates at Nicomedia ceremony

   Jan 1, 30505Labels: Diocletian, Nicomedia

   • Diocletian
   • Gibbon

10. Tetrarchic succession enacted after abdication

    Jan 1, 30505Labels: Tetrarchy, Augusti

    • Constantine