Diocletian (240–316)
Born 240 CE, died 316 CE.
Diocletian ( DY-ə-KLEE-shən; Latin: Gaius Aurelius Valerius Diocletianus; Ancient Greek: Διοκλητιανός, romanized: Diokletianós; 242/245 – 311/312), nicknamed Jovius, was Roman emperor from 284 until his abdication in 305. He was born Diocles to a family of low status in the Roman province of Dalmatia. As with other Illyrian soldiers of the period, Diocles rose through the ranks of the military early in his career, serving under Aurelian and Probus, and eventually becoming a cavalry commander for the army of Emperor Carus. After the deaths of Carus and his son Numerian on a campaign in Persia, Diocles was proclaimed emperor by the troops, taking the name "Diocletianus". The title was also claimed by Carus's surviving son, Carinus, but Diocletian defeated him in the Battle of the Margus. Diocletian's reign stabilized the empire and ended the Crisis of the Third Century. He initiated the process of permanently splitting the Roman Empire, appointing fellow officer Maximian as Augustus, co-emperor, in 286. Maximian ruled the Western Empire, while Diocletian reigned in the Eastern Empire as the senior Augustus.
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