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Millennium: 1st millennium
266 in various calendars
Gregorian calendar266
Ab urbe condita1019
Assyrian calendar5016
Balinese saka calendar187–188
Bengali calendar−327
Berber calendar1216
Buddhist calendar810
Burmese calendar−372
Byzantine calendar5774–5775
Chinese calendar乙酉年 (Wood Rooster)
2962 or 2902
    — to —
丙戌年 (Fire Dog)
2963 or 2903
Coptic calendar−18 – −17
Discordian calendar1432
Ethiopian calendar258–259
Hebrew calendar4026–4027
Hindu calendars
 - Vikram Samvat322–323
 - Shaka Samvat187–188
 - Kali Yuga3366–3367
Holocene calendar10266
Iranian calendar356 BP – 355 BP
Islamic calendar367 BH – 366 BH
Javanese calendar145–146
Julian calendar266
Korean calendar2599
Minguo calendar1646 before ROC
Nanakshahi calendar−1202
Seleucid era577/578 AG
Thai solar calendar808–809
Tibetan calendar阴木鸡年
(female Wood-Rooster)
392 or 11 or −761
    — to —
(male Fire-Dog)
393 or 12 or −760
Odaenathus (totius Orientis imperator)

Year 266 (CCLXVI) 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 Gallienus and Sabinillus (or, less frequently, year 1019 Ab urbe condita). The denomination 266 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.


By place[edit]

Roman Empire[edit]

  • King Odaenathus of Palmyra invades Persia to conquer the capital, Ctesiphon, and twice comes as far as the walls of the Persian capital, but fails to take it.[1][2][3] After his victories in the East, he pronounces himself with the title "king of kings".
  • A powerful tropical volcanic eruption around this year brings a below-average flood of the Nile next year.[4]



  • February 4Sima Yan, regent of the Chinese state of Cao Wei, forces the last Cao Wei emperor Cao Huan to abdicate in his favour. The Cao Wei state's existence comes to an end. Sima Yan establishes the Jin Dynasty, and becomes its first emperor on 8 February, and is historically known as "Wu of Jin". He establishes his capital at Luoyang, and gives his male relatives independent military commands throughout his empire.



  • Wang Chen (or Chudao), Chinese general and politician
  • Wang Fan, Chinese astronomer and mathematician (b. 228)


  1. ^ Who's Who in the Roman World By John Hazel
  2. ^ Babylonia Judaica in the Talmudic Period By A'haron Oppenheimer, Benjamin H. Isaac, Michael Lecker
  3. ^ The New Encyclopædia Britannica
  4. ^ Climate change in antiquity: Mass emigration due to water scarcity. sciencedaily.com January 25, 2021