Main Page | See live article | Alphabetical index Centuries: 8th century - 9th century - 10th century Decades: 770s 780s 790s 800s 810s - 820s - 830s 840s 850s 860s 870s Years: 817 818 819 820 821 - 822 - 823 824 825 826 827 Events Abd-ar-rahman II becomes ruler of Umayyad Spain. Begin of the power struggle between Byzantine Emperor Michael II and Thomas. Rabanus Maurus becomes abbott of Fulda. Births Deaths\n This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.