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Centuries: 8th century - 9th century - 10th century Decades: 770s 780s 790s 800s 810s - 820s - 830s 840s 850s 860s 870s Years: 822 823 824 825 826 - 827 - 828 829 830 831 832 Events Succession of Pope Valentine[?], then Pope Gregory IV. Arabs invade Sicily. The royal ceremonial centre at Copán is abandoned. Chalid Ben Abdulmelik and Ali Ben Isa measure the size of the Earth. Births Saint Cyril, scholar, theologian and linguist Emperor Montoku of Japan Deaths Pope Eugene II September: Pope Valentine[?]
Centuries: 8th century - 9th century - 10th century
Decades: 770s 780s 790s 800s 810s - 820s - 830s 840s 850s 860s 870s
Years: 822 823 824 825 826 - 827 - 828 829 830 831 832
Births
Deaths