820s
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| Millennium: | 1st millennium |
| Centuries: | 8th century – 9th century – 10th century |
| Decades: | 790s 800s 810s – 820s – 830s 840s 850s |
| Years: | 820 821 822 823 824 825 826 827 828 829 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
This is a list of events occurring in the 820s, ordered by year.
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Contents
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820
By place
Asia
- Tahir, the son of a slave, is rewarded with the governorship of Khurasan for supporting the caliphate. He rules independently of Baghdad, not even mentioning the caliph's name in Friday prayers in recognition of caliphal authority.
Byzantine Empire
- Michael II succeeds Leo V as Byzantine Emperor.
Europe
- The Historia Brittonum is written (approximate date).
- Fedelmid mac Crimthainn assumes the kingship of Munster.
By topic
Science and technology
- Muslim mathematician Muḥammad ibn Mūsā al-Ḵwārizmī founds algebra.
821
By place
Asia
- Tang Mu Zong becomes emperor of China.
- First recorded session of the Parliament of Croatia
Byzantine Empire
- The Byzantine general Thomas the Slav secures control over most of Byzantine Anatolia as well as recognition from the Abbasid Caliphate, and crosses over into Europe. The emperor Michael II is blockaded in Constantinople, but Thomas' first attack on the city fails.
822
By place
Europe
- Abd-ar-rahman II becomes ruler of Umayyad Spain.
Byzantine Empire
- The civil war between Byzantine Emperor Michael II and the general Thomas the Slav continues. Thomas unsuccessfully attacks Constantinople, while his fleet is destroyed by Michael's navy using Greek fire.
Asia
- Gim Heon-chang launches a short-lived rebellion in Silla.
By topic
Religion
- Rabanus Maurus becomes abbott of Fulda.
823
By place
Byzantine Empire
- Defeat of the Byzantine rebel Thomas the Slav by the forces of Michael II at Diabasis in Thrace. Thomas and his supporters flee to Arkadiopolis, where they are blockaded by imperial troops. After five months, Thomas is surrendered to Michael by his supporters and executed.
Asia
- Emperor Junna ascends to the throne of Japan.
824
By place
Europe
- Third Battle of Roncevaux Pass: The Basques and Banu Qasi defeat counts Eblo and Aznar, Frankish vassals.
- Iñigo Arista revolts against the Franks and establishes the kingdom of Navarre (approximate date).
- The Constitutio Romana establishes the authority of the Holy Roman Emperors over the pope.
Byzantine Empire
- The last strongholds held by supporters of Thomas the Slav surrender or are taken by loyalist forces.
- Possible year of the conquest of Crete by Andalusian exiles.
By topic
Religion
- May 11 – Pope Eugene II succeeds Pope Paschal I as the 99th pope (probable date).
825
By place
Europe
- Egbert of Wessex defeats Beornwulf of Mercia at Ellandun. Kent, Surrey, Sussex and Essex submit to Wessex and East Anglia acknowledges Egbert as overlord.
- Emperor Louis the Pious of the Franks wars against the Wends and Sorbs.
- Teaching begins at Oxford, England, according to documents held by University College, Oxford and All Souls College, Oxford
826
By place
Asia
- Tang Wen Zong succeeds Tang Jing Zong as emperor of China.
By topic
Religion
- June 24 – The Danish king Harald Klak accepts Christianity.
827
By place
Europe
- Beginning of the invasion of Sicily by the Aghlabid dynasty of Ifriqiya (Tunisia). The campaign in the island against Byzantium will take 51 years.[1]
- Agnellus Iustinianus Particiacus appointed Roman consul and duke of Venice.
- Possible year of the conquest of Crete by Andalusian exiles.
America
- The royal ceremonial centre at Copán is abandoned.
By topic
Religion
- August – Pope Valentine succeeds Pope Eugene II as the 100th pope.
- Pope Gregory IV succeeds Pope Valentine as the 101st pope (date unclear).
Science
- Chalid Ben Abdulmelik and Ali Ben Isa measure the size of the Earth.
828
By place
Europe
- Al-Andalus: The city of Merida rises twice in one year against the Umayyad emirate.[2]
- Egbert of Wessex becomes the first King of England.
- Alcamo is founded by the Muslim commander al-Kamuk.
- Relics of Saint Mark are brought to Venice from Alexandria.
Asia
- In the Tang Dynasty Chinese capital of Chang'an, a powerful court eunuch orders 50 wrestlers to arrest 300 commoners over a land property dispute in Northwest Chang'an, whereupon a riot breaks out in the streets between the grapplers and the citizens.
By topic
Religion
- The first Christian church in central and eastern Europe is built in Nitra (present-day Slovakia).
- A Coptic revolt breaks out in Egypt.
- Saint Meinrad starts to live in Einsiedeln, Switzerland.
829
By place
Europe
- Egbert of Wessex conquers Mercia and is recognized as Bretwalda.
- The Saracens ravage the coast of Dalmatia.
- Oldest known mention of the city of Wiesbaden (approximate date).
- The synod of Mainz is held.
- The Bulgarians conquer Slavonia.
- The Croats are not under Frankish rule anymore.
Byzantine Empire
- Theophilus succeeds Michael II as emperor of Byzantium.
Egypt
- The Nile freezes over.[3]
Asia
By topic
Religion
- Ansgar is appointed missionary to Sweden by Louis the Pious, at the request of the Swedish king Björn at Hauge.
Significant people
Births
Deaths
References
- ^ Gilbert Meynier (2010) L'Algérie cœur du Maghreb classique. De l'ouverture islamo-arabe au repli (658-1518). Paris: La Découverte; pp.23.
- ^ Rucquoi, Adeline (1993). Histoire médiévale de la Péninsule ibérique. Paris: Seuil. p. 86. ISBN 2-02-012935-3.
- ^ Lamb, H. H. (1977) Climate: Present, Past and Future: Climatic History and the Future. Vol 2, Methuen and Co. Ltd., London.
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