822 in history

Died in 822

May 21 Al-Hakam I Umayyad Emir of Cordoba from 796 until 822 in the Al-Andalus.
Jun 26 Saichō a Japanese Buddhist monk credited with founding the Tendai school in Japan, based around the Chinese Tiantai tradition he was exposed to during his trip to China beginning in 804. He founded the temple and headquarters of Tendai at Enryaku-ji on Hiei near Kyoto. He is also said to have been the first to bring tea to Japan. After his death, he was awarded the posthumous title of Dengyō Daishi