Events

• Christian missionary Ansgar visits Birka, trade city of the Swedes.
• 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.
• Borobodur is completed as a Buddhist monument, after about 50 years of work.

Births

• Emperor Kōkō, emperor of Japan (d. 887)
• Carloman, King of Bavaria (d. 880)
• Dae Ijin, king of Korean-Manchurian kingdom of Balhae (d. 857)

Deaths

• Saint Glastian, mediator between Scots and Picts

830

830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830년 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830年 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | 830 | พ.ศ. 1373 | 830 | 830 | 830年