823
Year 823 was a common year starting on Thursday of the Julian calendar.
Events
By place
Byzantine Empire
- Emperor Michael II defeats the rebel forces under Thomas the Slav in Thrace. He and his supporters are forced to seek refuge in Arkadiopolis. After five months of blockade, Thomas surrenders and is delivered to Michael, seated on a donkey and bound in chains. He pleads for clemency and prostrates before Michael, but is executed.
Europe
- April 5 - Lothair I, eldest son of Emperor Louis I, is crowned co-emperor again by Pope Paschal I at Rome.
Britain
- King Ceolwulf I of Mercia is deposed by Beornwulf, who takes the throne of Mercia. During his rule he rebuilds the Abbey of St. Peter, and presides over two synods at Clofesho.
Japan
- May 30 - Emperor Saga abdicates the throne, after a 10-year reign. He is succeeded by his brother Junna, as the 53rd emperor of Japan.
Births
- June 13 - Charles the Bald, king of the Franks
- Ermentrude of Orléans, queen of the Franks
- Muhammad I, Muslim emir of Córdoba
- Pepin [II of Aquitaine|Pepin II], king of Aquitaine
Deaths
- Adelochus, archbishop of Strasbourg
- Boniface I, [Margrave of Tuscany|Boniface I], margrave of Tuscany
- Ceolwulf I, king of Mercia
- Gondulphus, bishop of Roman [Catholic Diocese of Metz|Metz]
- Han Hong, general of the Tang Dynasty b. 765)
- Ljudevit, duke of the Slavs in Lower Pannonia
- Thekla, Byzantine empress
- Thomas the Slav, Byzantine general and usurper
- Timothy I, Syrian patriarch
- Wulfheard, bishop of Hereford