This article is about the year 810. For the number, see 810 (number).
Year 810 (DCCCX) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.
October 1 - A man with a sword makes an attempt on emperor Nicephorus I's life. In the following trial, the assassin claims insanity as his defense.,
China demands the return of territory by Tibet.,
Bulgars, under king Krum, destroy the Avars.,
Al-Andalus: uprising of the city of Mérida against the Umayyad ruler.,
The Temple of the Jaguar Priest is constructed in Tikal National Park, Guatemala.,
Book of Kells is completed by the Celts.,
Muhammad al-Bukhari, Persian scholar,
Kassia, Greek-Byzantine composer and hymnographer (d. 867),
Emperor Xuānzong of Tang,
July 8 - King Pippin of Italy (b. 773),
Dharama Pala, second Emperor of the Pāla Empire,
Abul-Abbas, the Asian elephant given to Charlemagne by Harun ar-Rashid in 797 or 802, of pneumonia.