Year 290 (CCXC) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Valerius and Valerius (or, less frequently, year 1043 Ab urbe condita). The denomination 290 for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
Events
By place
Roman Empire
Emperor Diocletian campaigns with success against Arabic enemies.
Following his victory over Emperor Maximian's fleet, the usurper Carausius invades the European mainland and re-establishes his military and administrative presence in northern Gaul.
Asia
May 16 – Emperor Wu of Jin, founder of the Western Jin Dynasty, dies after a 25-year reign. He reunifies north and south, but gives away many dukedoms to his kinsmen. Crown Prince Sima Zhong succeeds his father, and has to deal with conflicts among the aristocratic families in China.
