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Year 191 (CXCI) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Apronianus and Bradua (or, less frequently, year 944 Ab urbe condita). The denomination 191 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.
|Ab urbe condita||944|
|Balinese saka calendar||112–113|
|Chinese calendar||庚午年 (Metal Horse)|
2887 or 2827
— to —
辛未年 (Metal Goat)
2888 or 2828
|Coptic calendar||−93 – −92|
|- Vikram Samvat||247–248|
|- Shaka Samvat||112–113|
|- Kali Yuga||3291–3292|
|Iranian calendar||431 BP – 430 BP|
|Islamic calendar||444 BH – 443 BH|
|Minguo calendar||1721 before ROC|
|Seleucid era||502/503 AG|
|Thai solar calendar||733–734|
317 or −64 or −836
— to —
318 or −63 or −835
- A coalition of Chinese warlords from the east of Hangu Pass launches a punitive campaign against the warlord Dong Zhuo, who seized control of the central government in 189, and held the figurehead Emperor Xian hostage. After suffering some defeats against the coalition forces, Dong Zhuo forcefully relocates the imperial capital from Luoyang to Chang'an. Before leaving, Dong Zhuo orders his troops to loot the tombs of the Han emperors, and then destroy Luoyang by fire, to leave behind nothing for the coalition.
- Battle of Jieqiao: Yuan Shao narrowly defeats Gongsun Zan, in northern China.
- c. 191–192 – The sculpture Commodus as Hercules, from Esquiline Hill, Rome, is made (it is now kept at Palazzo dei Conservatori, Rome).