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|221 by topic|
|Ab urbe condita||974|
|Balinese saka calendar||142–143|
|Chinese calendar||庚子年 (Metal Rat)
2917 or 2857
— to —
辛丑年 (Metal Ox)
2918 or 2858
|Coptic calendar||−63 – −62|
|- Vikram Samvat||277–278|
|- Shaka Samvat||142–143|
|- Kali Yuga||3321–3322|
|Iranian calendar||401 BP – 400 BP|
|Islamic calendar||413 BH – 412 BH|
|Minguo calendar||1691 before ROC
|Seleucid era||532/533 AG|
|Thai solar calendar||763–764|
347 or −34 or −806
— to —
348 or −33 or −805
|Wikimedia Commons has media related to 221.|
Year 221 (CCXXI) 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 Gratus and Vitellius (or, less frequently, year 974 Ab urbe condita). The denomination 221 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.
- June 26 – Emperor Elagabalus adopts his cousin Alexander Severus as his heir and receives the title of Caesar.
- July – Elagabalus is forced to divorce Aquilia Severa and marries his third wife Annia Faustina. After five months he returns to Severa and claims that the original divorce is invalid. The marriage is symbolic, because Elagabalus appears to be homosexual or bisexual. According to the historian Cassius Dio, he has a stable relationship with his chariot driver, the slave Hierocles.
- May 15 – Liu Bei, Chinese warlord and descendant of the imperial clan of the Han dynasty, proclaims himself emperor in Chengdu, Sichuan and establishes the state of Shu Han.
- August 4 – Lady Zhen, noble lady of the Cao Wei state (b. 183)
- Mi Zhu, official of the Shu Han state (b. 165)
- Yu Jin, general of the Cao Wei state
- Zhang Fei, general of the Shu Han state