Directory

821 CE

Duke Borna of Croatia dies after an 11-year reign, as vassal of the Frankish Empire. He is succeeded by his nephew, Vladislav. Emperor Louis I recognizes him as prince of Dalmatia and Liburnia, at the Council of Aachen. Lothair I, co-emperor and eldest son of Louis I, marries Ermengarde in Thionville (northeastern France). She is the daughter of Count Hugh of Tours. Tahir ibn Husayn, an Iranian general, is appointed as governor of Khurasan, as a reward for supporting the Abbasid caliph al-Ma'mun in the Fourth Fitna.

Religion & Belief

  • Byzantine general Thomas the Slav leads a revolt, and secures control over most of the Byzantine themes (provinces) in Anatolia. He gets recognition from the Abbasid Caliphate, and concludes a peace treaty with Caliph al-Ma'mun. Thomas crosses with his fleet from Abydos to Thrace, and blockades Emperor Michael II in Constantinople; but Thomas' first attack on the capital fails.source
  • Caliph Al-Ma'mun appoints Nu'aym ibn al-Waddah al-Azdi as the governor of Yemen.source
  • Tahir ibn Husayn, an Iranian general, is appointed as governor of Khurasan, as a reward for supporting the Abbasid caliph al-Ma'mun in the Fourth Fitna.source
  • By the time Al-Ma'mun becomes caliph, the Arabs and the Byzantines have settled down into border skirmishing, with Arab raids deep into Anatolia to capture booty.source

Culture & Society

  • October – Lothair I, co-emperor and eldest son of Louis I, marries Ermengarde in Thionville (northeastern France). She is the daughter of Count Hugh of Tours.source

Births

  • Gisela, Frankish princess, daughter of Louis the Pioussource
  • Ibn Abi Asim, Muslim Sunni scholar (or 822)source
  • Ordoño I, king of Asturias (approximate date)source
  • Gao Pian, general of the Tang dynasty (d. 887)source

Deaths

  • February – Duke Borna of Croatia dies after an 11-year reign, as vassal of the Frankish Empire. He is succeeded by his nephew, Vladislav. Emperor Louis I recognizes him as prince of Dalmatia and Liburnia, at the Council of Aachen.source
  • April 7 – George the Standard-Bearer, archbishop of Mytilene (b. c. 776)source
  • May 2 – Liu Zong, general of the Tang dynastysource
  • December 18 – Theodulf, bishop of Orléanssource
  • Zheng Yuqing, chancellor of the Tang dynasty (b. 746)source
  • Benedict of Aniane, Frankish monksource
  • Artrí mac Cathail, king of Munster (Ireland)source
  • Li Su, general of the Tang dynasty (b. 773)source
  • Guisclafred, Frankish nobleman (approximate date)source
  • King Coenwulf of Mercia dies in Basingwerk near Holywell (Wales), while preparing for another assault on Powys, and is buried in Winchcombe Abbey. He is briefly succeeded by his son Cynehelm, but he is killed, probably fighting the Welsh, though supposedly through the treachery of his sister Cwenthryth. The Mercian throne passes to Coenwulf's brother, Ceolwulf I.source
  • Wei Guanzhi, chancellor of the Tang dynasty (b. 760)source
  • Tian Hongzheng, general of the Tang dynasty (b. 764)source