9th century

801 – 900 · 16 events

What happened around the world

843 Treaty of Verdun — Charlemagne's grandsons sketch future France and Germany
863 Mission of Cyril and Methodius — Slavic writing is born: an alphabet and the first books

860 The Rus' first raid Constantinople — A Rus' fleet suddenly appears before the Byzantine capital
c. 862 Calling of the Varangians — By the chronicle, Rurik's rule marks the start of Rus'
882 Oleg takes Kiev — Per the chronicle, Novgorod and Kyiv unite under one prince
c. 895 Hungarian conquest of the Carpathian Basin — Árpád's Magyars settle the Danube plain, splitting the Slavs

c. 820 Al-Khwarizmi's treatise on algebra — A Baghdad scholar gives the world the word 'algorithm'

859 Fatima al-Fihri founds al-Qarawiyyin — The world's oldest working school was founded by a woman
c. 900 The bronzes of Igbo-Ukwu — Casting so fine that scholars doubted how old it was

802 Founding of the Khmer Empire — Jayavarman II proclaims himself god-king, the road to Angkor
868 The Diamond Sutra is printed — China prints the oldest surviving dated book
869 Jōgan earthquake and tsunami — A tsunami floods Sendai and returns 1,142 years later

c. 850 Chan Chan, capital of Chimor — The largest adobe city in the Americas
c. 850 Pueblo Bonito at Chaco Canyon — Hundreds of desert rooms built without wheels or draft animals
c. 852 Mount Churchill eruption — Alaskan ash reaches the bogs of Ireland and Germany
c. 900 Rise of Chichen Itza — At the equinox a serpent of shadow slides down the pyramid

Rus and Russia: Rurik 862 – 879, Oleg the Wise 879 – 912
England and Britain: Alfred the Great 871 – 899, Edward the Elder 899 – 924
Franks and France: Charlemagne 768 – 814, Louis the Pious 814 – 840, Charles the Bald 843 – 877
China: dynasties: Tang 618 – 907
Japan: shoguns & emperors: Emperor Kanmu 781 – 806, Heian period (emperors and Fujiwara regents) 806 – 1185
Rome and Byzantium: Heraclians and Isaurians 610 – 867, Macedonian dynasty 867 – 1056