|Centuries:||2nd century – 3rd century – 4th century|
|Decades:||180s 190s 200s – 210s – 220s 230s 240s|
|Years:||209 210 211 – 212 – 213 214 215|
|212 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||965|
|Chinese calendar||辛卯年 (Metal Rabbit)
2908 or 2848
— to —
壬辰年 (Water Dragon)
2909 or 2849
|Coptic calendar||−72 – −71|
|- Vikram Samvat||268–269|
|- Shaka Samvat||134–135|
|- Kali Yuga||3313–3314|
|Iranian calendar||410 BP – 409 BP|
|Islamic calendar||423 BH – 422 BH|
|Minguo calendar||1700 before ROC
|Seleucid era||523/524 AG|
|Thai solar calendar||754–755|
|Wikimedia Commons has media related to 212.|
Year 212 (CCXII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Asper and Camilius (or, less frequently, year 965 Ab urbe condita). The denomination 212 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.
- The edict of emperor Caracalla (Constitutio Antoniniana) extends Roman citizenship to all free inhabitants of the Roman Empire with the exception of a limited group that may include Egyptians. The Jewish people are among those who receive citizenship.
- Roman jurist Aemilius Papinianus, one of the famous jurists who flourished during the reign of the late emperor Septimius Severus, refuses to write a legal defence for the murder of Caracalla's brother, Publius Septimius Geta. He is beheaded in Rome, in Caracalla's presence.
- Caracalla quiets the objections of the Roman army to Geta's murder by huge donations.
- Construction begins on the Baths of Caracalla in Rome.
- Edessa becomes a Roman province.
- Liang Xing, general of the Han Dynasty
- Ma Teng, father of Ma Chao, Prefect of Liang Province, China (b. 156)
- Ma Xiu, Second son of Ma Teng
- Ma Tie, Third son of Ma Teng
- Serenus Sammonicus, poet and physician
- Papinianus, Roman jurist and Praetorian prefect under Septimius Severus (b. 142)
- Xun Yu, advisor to Cao Cao (b. 163)
- Yang Huai, general under the warlord Liu Zhang