Events

• 11 May: Printing of The Diamond Sutra, the oldest dated printed book.
• Aghlabid dynasty of Tunisia takes Malta.
• In Metz, Charles the Bald and Louis the German decide on a division of the lands of former emperor Lothar (now in possession of Lothar II and Louis II).
• In England Alfred the Great marries Ealhswith and goes to the aid of Burgred of Mercia, who is attacked by Danes.
• Ratramnus writes Contra Graecorum opposita.
• Establishment of the County of Portugal, by Vímara Peres , after the reconquest from the Moors of the region north of the Douro River

Births

• Muhammad al-Mahdi, Shia Imam.

Deaths

• July 1 - Ali al-Hadi, Shia Imam (b. 828)
• Ratramnus, theologian (approximate date)