820 - Definition and Overview

Events

• Michael II succeeds Leo V as Byzantine Emperor
• The Historia Brittonum is written (approximate date)

Births

• Rhodri Mawr ('the Great'), ruler of Gwynedd (Wales) (approximate date)
• Photius I, patriarch of Constantinople (approximate date)

Deaths

• December 24: Leo V, Byzantine Emperor (assassinated)
• Shankara, Hinduist teacher
• Tang Xian Zong, emperor of China (end of reign)