Decades: 770s 780s 790s 800s 810s - 820s - 830s 840s 850s 860s 870s

Years: 819 820 821 822 823 - 824 - 825 826 827 828 829

• Iñigo Arista revolts against the Franks and establishes the kingdom of Navarre (approximate date).
• Pope Eugene II begins his pontificate

Deaths

• February 11 - Pope Paschal I (817-824)
• Emperor Heizei of Japan
• Thomas, claimant to the throne of the Byzantine Empire\n