900

Asia

 * formally establishes the kingdom of in southwestern.
 * from southwest and  settle on the east- coast, trading,  and  for  and.

Europe

 * of the or  dynasty subdues the petty kings of  and conquers the  and  islands.

Religion

 * — succeeds  as the 117th.

Medicine

 * scientist,, distinguished from  in the course of his writings. Holding against any sort of orthodoxy, particularly Aristotle's physics, he maintained "the conception of an 'absolute' time, regarded by him as a never-ending flow".

Births

 * , Persian astronomer and mathematician

Deaths

 * —, last King of Lotharingia (b. )
 * , King of the
 * ,, assassinated by Count