Year 311 (CCCXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Valerius and Maximinus (or, less frequently, year 1064 Ab urbe condita). The denomination 311 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 311 CCCXI |
| Ab urbe condita | 1064 |
| Assyrian calendar | 5061 |
| Balinese saka calendar | 232–233 |
| Bengali calendar | −282 |
| Berber calendar | 1261 |
| Buddhist calendar | 855 |
| Burmese calendar | −327 |
| Byzantine calendar | 5819–5820 |
| Chinese calendar | 庚午年 (Metal Horse) 3008 or 2801 — to — 辛未年 (Metal Goat) 3009 or 2802 |
| Coptic calendar | 27–28 |
| Discordian calendar | 1477 |
| Ethiopian calendar | 303–304 |
| Hebrew calendar | 4071–4072 |
| Hindu calendars | |
| - Vikram Samvat | 367–368 |
| - Shaka Samvat | 232–233 |
| - Kali Yuga | 3411–3412 |
| Holocene calendar | 10311 |
| Iranian calendar | 311 BP – 310 BP |
| Islamic calendar | 321 BH – 320 BH |
| Javanese calendar | 191–192 |
| Julian calendar | 311 CCCXI |
| Korean calendar | 2644 |
| Minguo calendar | 1601 before ROC 民前1601年 |
| Nanakshahi calendar | −1157 |
| Seleucid era | 622/623 AG |
| Thai solar calendar | 853–854 |
| Tibetan calendar | 阳金马年 (male Iron-Horse) 437 or 56 or −716 — to — 阴金羊年 (female Iron-Goat) 438 or 57 or −715 |
Events
By place
Roman Empire
- May 5 – Emperor Galerius declares on his deathbed religious freedom and issues his Edict of Toleration, ending persecution of Christians in the Eastern part of the Roman Empire. He dies, age 51, from a gruesome disease, possibly bowel cancer or Fournier gangrene.
- Maximinus II divides the Eastern Empire between co-emperor Licinius, and mobilises his army for a campaign in Asia Minor. He recommences the persecution of Christians.
- Maxentius, Roman usurper, reconquers the African provinces from Domitius Alexander.
- Maxentius builds the Circus of Maxentius near the Via Appia. The circus is 513 meters long and 91 meters wide, and offers an accommodation to some 10,000 people.
- December 3 – Diocletianus dies at his palace in Split (Croatia). Possibly he commits suicide.
China
- Jin Huaidi, emperor of the Jin Dynasty, is captured at Luoyang. The capital city is pillaged by Liu Cong, ruler of the Xiongnu state (Huns), the invaders slaughter 30,000 citizens.
By topic
Religion
- July 2 – Pope Miltiades succeeds Pope Eusebius as the 32nd pope.
- The Donatist schism occurs in the African church.
Births
Deaths
- November 25 – Saint Peter, Patriarch of Alexandria (martyred)
- December 3 – Gaius Aurelius Valerius Diocletianus, Roman Emperor (b. 244)
- Domitius Alexander, Roman usuper (approximate date)
- Gaius Galerius Valerius Maximianus, Roman emperor (b. 260)
- Sima Yue, prince and regent of the Jin Dynasty