814

814 in various calendars
Gregorian calendar	814; DCCCXIV
Ab urbe condita	1567
Armenian calendar	263; ԹՎ ՄԿԳ
Assyrian calendar	5564
Balinese saka calendar	735–736
Bengali calendar	221
Berber calendar	1764
Buddhist calendar	1358
Burmese calendar	176
Byzantine calendar	6322–6323
Chinese calendar	癸巳年 (Water Snake); 3511 or 3304; — to —; 甲午年 (Wood Horse); 3512 or 3305
Coptic calendar	530–531
Discordian calendar	1980
Ethiopian calendar	806–807
Hebrew calendar	4574–4575
Hindu calendars
- Vikram Samvat	870–871
- Shaka Samvat	735–736
- Kali Yuga	3914–3915
Holocene calendar	10814
Iranian calendar	192–193
Islamic calendar	198–199
Japanese calendar	Kōnin 5; (弘仁５年)
Javanese calendar	710–711
Julian calendar	814; DCCCXIV
Korean calendar	3147
Minguo calendar	1098 before ROC; 民前1098年
Nanakshahi calendar	−654
Seleucid era	1125/1126 AG
Thai solar calendar	1356–1357
Tibetan calendar	阴水蛇年; (female Water-Snake); 940 or 559 or −213; — to —; 阳木马年; (male Wood-Horse); 941 or 560 or −212

Millennium:	1st millennium
Centuries:	8th century; 9th century ; 10th century;
Decades:	790s; 800s; 810s ; 820s; 830s;
Years:	811; 812; 813; 814 ; 815; 816; 817;

Year 814 (DCCCXIV) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar, the 814th year of the Common Era (CE) and Anno Domini (AD) designations, the 814th year of the 1st millennium, the 14th year of the 9th century, and the 5th year of the 810s decade.

Events

April 13 – Byzantine–Bulgarian Wars: Over the winter Krum, ruler (khan) of the Bulgarian Empire, had assembled a huge army (including Slavs and Avars), for a campaign against the Byzantine Empire. But before he sets out for a major attack on Constantinople, he dies of a stroke. Krum is succeeded by his son Omurtag.^[1]

January 28 – Charlemagne dies of pleurisy in Aachen, after an almost 14-year reign (since 800) as the first Roman Emperor of Frankish origin (the precursor of the Holy Roman Emperor). He is embalmed and buried in Aachen Cathedral. Charlemagne is succeeded by his son Louis the Pious, as king of the Frankish Empire.
Louis I establishes himself at the imperial court of Aachen. He appoints Benedict of Aniane as his chief advisor on religious matters, and makes him abbot of Kornelimünster Abbey, which is founded by him.

Shinsen Shōjiroku, a record of the genealogy of the ancient Japanese noble families, is completed during the reign of Emperor Saga.

Byzantine Iconoclasm: Conflict erupts between Emperor Leo V and Patriarch Nikephoros, on the subject of iconoclasm. The latter is excommunicated.

^ John V.A. Fine, Jr. (1991). The Early Medieval Balkans: A Critical Survey from the Sixth to the Late Twelfth Century, p. 99. ISBN 978-0-472-08149-3.