822
{{short description|Calendar year}}
{{Use mdy dates|date=February 2011}}
{{About year|822}}
{{Year nav|822}}
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File:Louis the Pious.jpg doing penance at Attigny]]
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Year 822 (DCCCXXII) was a common year starting on Wednesday of the Julian calendar.
Events
= By place =
== Byzantine Empire ==
- Byzantine general and usurper Thomas the Slav continues his revolt against Emperor Michael II. He unsuccessfully besieges Constantinople, while his fleet is destroyed by Michael's fleet, using Greek fire.
- Battle of Kedouktos (near Heraclea): Khan Omurtag of Bulgaria sends a relief army, and defeats the Byzantine rebels.{{cite book|last=Bury|first=John Bagnell|authorlink=J.B. Bury|title=A History of the Eastern Roman Empire from the Fall of Irene to the Accession of Basil I (A.D. 802–867)|location=London |publisher=Macmillan and Company|year=1912|url=https://archive.org/details/ahistoryeastern00burygoog|oclc=458995052|pages=101–102}}{{cite book|last=Lemerle|first=Paul|authorlink=Paul Lemerle|chapter=Thomas le Slave|title=Travaux et mémoires 1|location=Paris |publisher=Centre de recherche d'histoire et civilisation de Byzance|year =1965|language=French |oclc=457007063| pages=279–281, 291}}{{The Byzantine Revival, 780–842| page=240}}
== Europe ==
- Emperor Louis I performs public penance for causing his nephew Bernard's death 4 years earlier, at his palace of Attigny (Ardennes), before Pope Paschal I, and the Frankish nobles (this to restore harmony and re-establish his authority).McKitterick, Rosamond, The New Cambridge History, 700-900.
- The earliest known mention of the Serbs, in Einhard's Royal Frankish Annals.
== Britain ==
- King Ceolwulf I of Mercia invades Powys (Wales), but is beaten back by King Cyngen. However, Ceolwulf does destroy the fortress of Deganwy, and later takes the kingdom under his control (approximate date).
== Al-Andalus ==
- Al-Hakam I, Umayyad emir of Córdoba, dies after a 26-year reign. He is succeeded by his son Abd al-Rahman II, who begins a military campaign against King Alfonso II of Asturias in Al-Andalus (modern Spain).
== Asia ==
- Kim Hŏn-ch'ang launches a short-lived rebellion in Silla, which gains control over much of the southern and western Korean Peninsula.
== Central America ==
= By topic =
== Religion ==
- Rabanus Maurus, a Frankish Benedictine monk, becomes abbot of Fulda, after the death of Eigil.
Births
- Al-Mutawakkil, Muslim caliph (d. 861)
- Ibn Abi Asim, Muslim Sunni scholar (or 821)
- Minamoto no Tōru, Japanese poet (d. 895)
- Xuefeng Yicun, Chinese Chan master (d. 908)
Deaths
- June 26 – Saichō, Japanese Buddhist monk (b. 767)
- Al-Hakam I, Muslim emir of Córdoba (b. 771)
- Al-Waqidi, Muslim historian and biographer
- Denebeorht, bishop of Worcester
- Eigil of Fulda, Bavarian abbot
- Gregory Pterotos, Byzantine general (strategos)
- Kim Hŏn-ch'ang, Silla aristocrat and rebel leader
- Li Yijian, chancellor of the Tang Dynasty (b. 756)
- Tahir ibn Husayn, founder of the Tahirid Dynasty
- Tian Bu, general of the Tang Dynasty (b. 785)
- Winiges, duke of Spoleto (Italy)