Major Events
- Jul 26 Battle of Pliska: Bulgarians under Krum beat Byzantines
Who Died in 811 AD
- Jun 17 Sakanoue no Tamuramar, Japanese shōgun under Emperor Kanmu, dies at 54
- Jul 26 Nicephorus I, Byzantine Emperor (802-11), dies in battle
- Dec 4 Charles The Younger, King the of Franks, son of the Emperor Charlemagne, dies at about 39