900

Events

By place

Asia

• Gyeonhwon formally establishes the kingdom of Hubaekje in southwestern Korea.
• Merchants from southwest Asia and India settle on the East African coast, trading gold, beads and metal for ivory and slaves.

Europe

• Harald Fairhair (of the Yngling or Scilfing Dynasty) subdues the petty kings of Norway and conquers the Orkney and Shetland Islands.

By topic

Religion

• February — Pope Benedict IV succeeds Pope John IX as the 117th pope.

Medicine

• The Persian scientist Rhazes distinguishes smallpox from measles in the course of his writings. Holding against any sort of orthodoxy, particularly Aristotle's physics, he maintains "the conception of an 'absolute' time, regarded by him as a never-ending flow".

Births

• Abu Jafar Khazeni, Persian astronomer and mathematician

Deaths

• August 13 — Zwentibold, last King of Lotharingia (b. 870)
• Domnall II, King of the Picts
• Fulk the Venerable, Archbishop of Rheims (assassinated by Count Baldwin II of Flanders)af:900

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