Centuries: 8th century - 9th century - 10th century Decades: 780s - 790s - 800s - 810s - 820s - 830s - 840s - 850s - 860s - 870s - 880s
Years: 830Events Christian missionary Ansgar visits Birka, trade city of the Swedes. Earliest date of composition for the Historia Brittonum, attributed to Nennius, and known for its list of 12 battles of King Arthur. Egbert of Wessex defeats the Welsh. Al-Khwarizm 831Events The Saracens capture Palermo. Saint Ansgar founds the first church in Sweden, at Birka Births Deaths 831. 832Events Theophilus forbids the usage of icons, establishing strict punishments. 833Events End of the reign of caliph Mamun Nimmyo succeeds Junna as emperor of Japan Creation of Great Moravia Births Deaths 833. 834Events First Viking raid of Dorestad. Unuist succeeded by Drest IV as king of the Picts. Births Deaths 834. 835Events Ragnar Lodbrok rises to power (approximate date) The celebration of All Saints is made an obligation throughout the Frankish Empire and fixed on November 1. Viking raid of Dorestad. Births Deaths November 27 Muhammad at-Taqi, Shia Imam Kukai founde 836Events Abbasid caliph al-Mutasim establishes new capital at Samarra, Iraq. Egbert of Wessex is defeated by the Danes. John VII Grammaticus succeeds Antony I as patriarch of Constantinople. Oldest known mentioning of the city of Soest. Births Thabit ibn Ku 837Events Pietro Tradonico elected Doge of Venice. Uen succeeds Drest IV as king of the Picts. April 10 Comet Halley passes approximately 5 million km from Earth it's closest ever approach to Earth. Births Deaths Abu ‘Ubayd al-Qasim ibn Sallam al-Baghdadi 83 838 839
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