Gaius Aurelius Valerius Diocletianus -LRB- c. 22 December 244 â '' 3 December 311 -RRB-, commonly known as Diocletian, was a Roman Emperor from 284 to 305.
Diocletian -LRB- Gaius Aurelius Valerius Diocletianus, ~ 245 to ~ 312 -RRB- was Roman Emperor from 20 November 284 to 11 May 305. Diocletian ended the period known as the Crisis of the Third Century -LRB- 235 â '' 284 -RRB-.