February 4 – Emperor Septimius Severus, having fallen ill, dies in Eboracum (modern-day York) while on campaign in Britain after an 18-year reign. He is later deified by the Senate. His sons Caracalla and Geta succeed him as joint Roman Emperors.
December 19 – Geta is lured to come without his bodyguards to meet Caracalla, to discuss a possible reconciliation. When he arrives the Praetorian Guard murders him and he dies in the arms of his mother Julia Domna.
Eboracum becomes the capital of Britannia Inferior, a northern province of the Roman Empire.
January – Cao Cao writes Ràng Xiàn Zì Míng Běn Zhì Lìng (讓縣自明本志令)
March – September: Cao Cao defeats Ma Chao at the Battle of Tong Pass.
Ardashir I becomes king of part of Persia.
Baths of Caracalla construction begins (approximate date).
Mark is succeeded by Philadelphus as Patriarch of Constantinople.
Sima Zhao, son of Sima Yi (d. 265)
Xiahou Hui, noble woman and wife of Sima Shi (d. 234)
February 4 – Roman emperor Septimius Severus (York, England) (b. 145)
Publius Septimius Geta, Roman co-emperor (murdered) (b. 189)
Serapion of Antioch, patriarch of Antioch
Wang Lei, minister under Liu Zhang
Year 211 (CCXI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Terentius and Bassus (or, less frequently, year 964 Ab urbe condita). The denomination 211 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.