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Events

By place

Roman Empire

* Pertinax quells the mutiny of the British Roman legions.
* Perennis, his family and many others are executed for conspiring against Commodus.

Asia

* Reign in India of Vasudeva, Kushan emperor.
* Zhi Yao, a Kushan Buddhist monk of Yuezhi ethnicity, translates Buddhist texts into the Chinese language during the Han Dynasty.

By topic

Arts and sciences

* Cleomedes discovers the refraction of light by the Earth's atmosphere.
* Chinese astronomers note in the "Astrological Annals of the Houhanshu" sight supernova now identified as RCW 86, the earliest identified supernova.

Religion

* Irenaeus writes that there are only four Gospels (approximate date).

Births

* Cao Zhen (d. 231)
* Liao Hua, approximate date (d. 264)
* Origen, Christian apologist (approximate date)
* Wang Xiang (d. 269)
* Xiahou Shang, approximate date (d. 225)

Deaths

* S. Datus, bishop of Ravenna (martyred)