827
| Years: 823 824 825 826 – 827 – 828 829 830 831 | |
| Decades: 790s 800s 810s – 820s – 830s 840s 850s | |
| Centuries: 8th century – 9th century – 10th century | |
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 (d. 869)
- Emperor Montoku of Japan (d. 858)
Deaths
- Pope Eugene II
- September: Pope Valentine
Categories: 827