Diocletian
Emperor of Rome; founder of the Tetrarchy
"Order must be imposed, or the world dissolves into chaos."
Biography
The Illyrian officer whose accession in 284 ended the Crisis, Diocletian was one of Rome's great reforming emperors. Recognising that no single man could govern and defend the vast empire, he divided its rule among four emperors — the 'Tetrarchy' — to end the endless succession wars. He overhauled the army, the provinces, the tax system, and the debased coinage, and remade the imperial office into a remote, sacred autocracy hedged with ceremony. His reforms stabilised the empire and gave it another century and more of life, transforming the classical Roman state into the bureaucratic, militarised world of late antiquity. His reign was also marked by the 'Great Persecution,' the last and most severe Roman assault on Christianity. In an act unique among Roman emperors, he voluntarily abdicated in 305 and retired to grow cabbages in his vast palace at Split — the only emperor of the age to leave power alive and by his own choice.
Did you know?
He is the only Roman emperor to abdicate voluntarily; when urged to return to power amid new civil wars, he reputedly replied that if his successors could see the cabbages he grew, they would never ask him to give up such peace.
Key Battles
The Accession of Diocletian
The Roman Central Government victoryNovember 284 · 2,000 total casualties
The accession of Diocletian is the conventional end of the Crisis. His sweeping reforms stabilised the empire and remade it into the more autocratic, bureaucratic, and militarised state of late antiquity, buying Rome another century and more of life. The empire that emerged was transformed almost beyond recognition from the one that had entered the Crisis fifty years before.
Life Journey
Timeline
c. 244
🌅 Birth
Born in Dalmatia
November 284
📍 Posting
Proclaimed emperor; begins his reforms
311
✝️ Death
Dies in retirement at his palace in Split