Calendar year From Wikipedia, the free encyclopedia
Year 900 (CM) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. It was the 900th year of the Common Era (CE) and Anno Domini (AD) designations, the 900th year of the 1st millennium, the 100th and last year of the 9th century, and the first year of the 900s.
August–Abdallah, son of the Aghlabid emir Ibrahim II, represses a revolt of his Muslim subjects, and then initiates a campaign against the last Byzantine strongholds in Sicily.[3]
August 13–Zwentibold, king of Lotharingia, is killed in battle on the Meuse River, while fighting against his rebellious subjects; subsequently they recognize Louis IV as their rightful suzerain - Lotharingia is then converted from a kingdom to a duchy.[10]
King Donald II is killed after an 11-year reign. He is succeeded by his cousin Constantine II as king of Scotland;[12] he will reign for more than 40 years.
After the rejection of their alliance proposal by the Bavarians, the Hungarians attack this country, occupying Pannonia and parts of Ostmark, which become part of the Hungarian state.
The Persian scientist Muhammad ibn Zakariya al-Razi 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".