901

By place

Europe

• February - King Louis III is crowned as Holy Roman Emperor by Pope Benedict IV at Rome. His rival Berengar I seeks refuge in Bavaria at the court of King Louis IV.
• March - Abu Abbas Abdallah resumes his Aghlabid campaign against the Byzantine enclaves of Sicily. He dispatches his fleet towards Messina, while bombarding the town walls of Damona.
• June 10 - Abu Abbas Abdallah crosses the Strait of Messina and proceeds to Reggio Calabria. Appearing before its walls, the Byzantine garrison flees, surrendering the city to the Aghlabids.
• Summer - Abu Abbas Abdallah defeats a relief Byzantine navy dispatched from Constantinople at Messina. He dismantles the fortifications of Messina and transfers his booty to Palermo.
• July 10 - In Al-Andalus, Ibn al-Qitt and Abū Naṣr ‘Abd Allāh ibn ‘Alī al-Sarrāj call for a small jihad, but are defeated by King Alfonso III at the battle of Zamora.

  Britain

• Fall - Æthelwold rebels against his cousin, King Edward the Elder. He comes with a fleet to Essex, and encourages the Danish Vikings of East Anglia to rise up.
• Edward the Elder takes the title "King of the Anglo-Saxons". His mother, Dowager-Queen Ealhswith, founds the Nunnaminster at Winchester and retires into a religious life there.
• The first written mention is made of Shrewsbury.

  Arabian Empire

• February 18 - Thābit ibn Qurra dies at Baghdad, having served as court astronomer to the Abbasid Caliph Al-Mutadid. He has spent his life translating and teaching the works of Greek mathematicians, and of his own.
• Abu 'Abdullah al-Shi'i leads the rebellion of the Kutama Berbers, against the Aghlabid emirate in Ifriqiya.

  Asia

• January 24 - Emperor Zhao Zong of the Tang Dynasty is restored to the Chinese throne. Liu, with four eunuch family members are killed.
• January 25 - Sugawara no Michizane, a Japanese poet, is demoted from his aristocratic rank and is exiled to a minor official post at Dazaifu.
• The Kingdom of Hu Goguryeo is established by the rebel leader Gung Ye. He subjugates the local lords in the Korean Peninsula and proclaims himself king.
• In China, Fuzhou City is expanded, with the construction of a new city wall.
• Abaoji is elected chieftain of the Yila tribe and becomes commander of all Khitan military forces.

  Mesoamerica

• The Mesoamerican ballgame court is dedicated by the Maya ruler Chan Chak K'ak'nal Ajaw at Uxmal.
• The Toltecs establish themselves at Tula. The city becomes the capital and rises to prominence after the fall of Teotihuacan.

  By topic

Religion

• January - Arethas of Caesarea speaks on the occasion of the Epiphany. He becomes the official rhetor at the Byzantine court of Emperor Leo VI at Constantinople, and is nominated as archbishop of Caesarea in Cappadocia.
• March 1 - Nicholas Mystikos, a layman close to Photios, becomes Patriarch of Constantinople.