820
Year 820 was a leap year starting on Sunday of the Julian calendar.Events
By place
Births
- Adalbert I, Frankish margrave
- Adelaide of Tours, Frankish noblewoman
- Álmos, military leader of the Hungarians
- Anandavardhana, Indian philosopher
- Ashot I, king of Armenia
- Buhturi, Syrian poet
- Godfrid Haraldsson, Danish Viking king
- Grimbald, Frankish Benedictine monk
- Hucbert, Frankish nobleman
- Ibn Khordadbeh, Persian geographer
- Qusta ibn Luqa, Syrian Melkite physician
- Ranulf I of Aquitaine, Frankish nobleman
- Rhodri the Great, king of Gwynedd
Deaths
- September 14, Li Yong, chancellor of the Tang Dynasty
- December 25, Leo V, emperor of the Byzantine Empire
- Adi Shankara, Indian philosopher and theologian
- Causantín mac Fergusa, king of the Picts
- Huangfu Bo, chancellor of the Tang Dynasty
- Lupo III, duke of Gascony
- Muhammad ibn Idris al-Shafi‘i, Muslim imam
- Olcobhar mac Cummuscach, abbot of Clonfert
- Song Ruoxin, Chinese scholar and poet
- Tnúthgal mac Donngaile, king of Munster
- Tutu Chengcui, eunuch and advisor of the Tang Dynasty
- Wang Chengzong, general of the Tang Dynasty
- Xian Zong, emperor of the Tang Dynasty
