830s

Millennium:	1st millennium
Centuries:	8th century – 9th century – 10th century
Decades:	800s 810s 820s – 830s – 840s 850s 860s
Years:	830 831 832 833 834 835 836 837 838 839
Categories:	Births – Deaths – Architecture Establishments – Disestablishments

This is a list of events occurring in the 830s, ordered by year.

By place

Africa

• Creation of the Ad-dimnah hospital in al-Qayrawan by the Aghlabid ruler Ziyadat Allah I.

Asia

• Borobodur is completed as a Buddhist monument, after about 50 years of work.

Europe

• 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.
• Christian missionary Ansgar visits Birka, trade city of the Swedes.

By place

Asia

• In this year, an Uyghur Turk sues the son of a Chinese Tang Dynasty grand general who had failed to repay a debt of 11 million government-issued copper coins. Emperor Wenzong of Tang soon hears the news, and is so upset that he not only banishes the general, but attempts to ban all trade between Chinese and foreigners except for goods and livestock. This ban is unsuccessful, and trade with foreigners resumes, especially in maritime affairs overseas.
• Large-scale Abbasid raid under Caliph al-Ma'mun into Cappadocia. Heraclea Cybistra and Tyana fall to the Arabs, and the Byzantine emperor Theophilos is defeated by Al-Abbas ibn al-Ma'mun

Europe

• Malamir succeeds Omurtag as Khan of Bulgaria.
• The Saracens capture Palermo.
• Louis the Pious is reinstated following the end of the first civil war of his reign.
• Nominoe is designed missus imperatoris by Louis the Pious and ducatus ipsius gentis of the Bretons.

By topic

Religion

• Saint Ansgar founds the first church in Sweden, at Birka.

By place

Asia

• The strategically important Byzantine fortress of Loulon falls to the Abbasids.

Europe

• Pepin I of Aquitaine and Louis the German revolt against Louis the Pious, Emperor of the Franks.
• The legendary genesis of the Flag of Scotland, appearing to Óengus (II) of Fortriu the night before a battle between his Pictish and Scottish forces against the Angles.
• Clondalkin, Ireland is sacked by Vikings.

By topic

Religion

• Theophilus forbids the usage of icons, establishing strict punishments.
• The second St Mark's Basilica in Venice (replacing an older church at a different location) is built.

By place

Asia

• al-Mu'tasim succeeds his brother Al-Ma'mun as Abbasid caliph.
• Emperor Nimmyō succeeds Emperor Junna as emperor of Japan.
• A biography of Muhammad by Ibn Ishaq is edited.

Europe

• Mojmír I unifies Great Moravia.

By place

Europe

• The Vikings first raid Dorestad (present-day Netherlands).
• Summer – The Viking ship of Oseberg is buried in a mound.
• Unuist is succeeded by Drest IV as king of the Picts.
• First known mention of Binsdorf, oldest part of Geislingen, and of Werne in Westphalia, Germany.
• Jona River in Switzerland was first mentioned

By place

Europe

• 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.
• The Vikings raid Dorestad.

Asia

• December 14 – Ganlu Incident: In the northeast sector of the Chinese capital Chang'an, after a failure by the chancellor Li Xun to slaughter the powerful eunuchs, troops under the eunuchs' command slaughter many court officials and Li Xun's associates.

By place

Asia

• Abbasid caliph al-Mutasim establishes a new capital at Samarra, Iraq.

Europe

• Egbert of Wessex is defeated by the Danes.
• Presian succeeds Malamir as Khan of Bulgaria.
• Oldest known mentioning of the city of Soest, Germany.
• Petrus Tradonicus Pola appointed Roman consul and duke of Venice.

By topic

Art

• The construction of Mosque of Uqba, Kairouan, Tunisia, begins.

Religion

• John VII Grammaticus succeeds Antony I as Patriarch of Constantinople.

By place

Europe

• Pietro Tradonico is elected Doge of Venice.
• Uen succeeds Drest IV as king of the Picts.
• Saracens from Egypt attack the Italian city of Naples.
• Vikings from Scandinavia attack Constantinople.

By topic

Astronomy

• April 10 – Comet Halley passes approximately 5 million km from Earth – its closest ever approach to Earth.

By place

Asia

• The Byzantine emperor Theophilos is heavily defeated at the Battle of Anzen by the Abbasids. Caliph al-Mu'tasim then proceeds to capture and raze Amorium, the native city of the Byzantine Empire's reigning Amorian dynasty.
• Discovery of a conspiracy to assassinate Caliph Mu'tasim and place his nephew Al-Abbas ibn al-Ma'mun on the throne. A widespread purge of the army follows, which cements the leading role of the Turkish ghilman in the Abbasid military establishment.

Europe

• At Hingston Down, Egbert of Wessex beats the Danish and the West Welsh.
• The Stone of Destiny is placed at Scone Palace, Scotland.
• Rheine is founded on the Ems River.
• According to the Annals of Inisfallen, a royal meeting between Feidlimid mac Cremthanin, King of Cashel and Niall, King of the Southern Uí Neill and Tara at Cluain-Conaire-Tommain, results in Feidlimid becoming High-King of Ireland.

By topic

Religion

• The Khazars convert to Judaism (approximate date).

By place

Europe

• Louis the Pious attempts to divide his empire among his sons.
• Ethelwulf succeeds Egbert as king of Wessex.
• Uen is succeeded by Uurad as king of the Picts.
• The reign of Alpin II of Dalriada begins (approximate date).
• The Balaton principality is created.
• The Saracen troops established in the South pillage Ancona in Central Italy.

Significant people

• Louis the Pious
• Egbert of Wessex
• Ansgar
• Wiglaf of Mercia
• Turgesius