900
| Years: 896 897 898 899 - 900 - 901 902 903 904 | |
| Decades: 870s 880s 890s - 900s - 910s 920s 930s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Persian scientist, Rhazes, distinguished smallpox from measles 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".
- 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.
- Harald Fairhair of the Yngling or Scilfing dynasty subdues the petty kings of Norway and conquers the Orkney and Shetland islands.
- February - Pope Benedict IV succeeds Pope John IX as the 117th pope.
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 Flandersaf:900
am:900 እ.ኤ.አ. ar:900 an:900 ast:900 az:900 bn:৯০০ bpy:মারি ৯০০ bs:900 bg:900 ca:900 cv:900 cs:900 co:900 da:900 de:900 et:900 el:900 es:900 eo:900 eu:900 fr:900 ko:900년 hr:900 io:900 id:900 it:900 ka:900 csb:900 ht:900 (almanak jilyen) la:900 lb:900 lmo:900 hu:900 mk:900 ms:900 nl:900 ja:900年 nap:900 no:900 nn:900 oc:900 pl:900 pt:900 ksh:Joohr 900 ro:900 ru:900 год sq:900 ru-sib:900 scn:900 simple:900 sk:900 sl:900 sr:900 fi:900 sv:900 tt:900 th:พ.ศ. 1443 tr:900 uk:900 uz:900 vec:900 zh:900年