The Wei dynasty gave official recognition to Taoism as its religious sect, and the sect’s celestial masters reciprocated by giving spiritual approbation to the Wei as successors to the Han. By the end of the century, most powerful families in northern China had subscribed to Daoist principles.
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.
The silver content of the Roman denarius falls to 35 percent under emperor Alexander Severus, down from 43 percent under Elagabalus.
October 14 – Pope Callixtus I is killed by a mob in Rome's Trastevere after a 5-year reign in which he has stabilized the Saturday fast three times per year, with no food, oil, or wine to be consumed on those days. Callixtus is succeeded by Cardinal Urban I.
A merchant from the Roman Empire, called "Qin Lun" by the Chinese, arrives in Jiaozhi (modern Hanoi), and is taken to see King Sun Quan of Eastern Wu, who requests him to make a report on his native country and people. He is given an escort for the return trip, including a present of ten male and ten female "blackish-colored dwarfs." However, the officer in charge of the Chinese escort dies, and Qin Lun has to continue his journey home alone.
Ctesiphon, until now capital of the Parthian Empire, falls into the hands of the Sasanian Empire, who also make it their capital, after putting an end to the Parthian Dynasty in Iran.