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Millennium: 1st millennium
811 in various calendars
Gregorian calendar811
Ab urbe condita1564
Armenian calendar260
Assyrian calendar5561
Balinese saka calendar732–733
Bengali calendar218
Berber calendar1761
Buddhist calendar1355
Burmese calendar173
Byzantine calendar6319–6320
Chinese calendar庚寅年 (Metal Tiger)
3507 or 3447
    — to —
辛卯年 (Metal Rabbit)
3508 or 3448
Coptic calendar527–528
Discordian calendar1977
Ethiopian calendar803–804
Hebrew calendar4571–4572
Hindu calendars
 - Vikram Samvat867–868
 - Shaka Samvat732–733
 - Kali Yuga3911–3912
Holocene calendar10811
Iranian calendar189–190
Islamic calendar195–196
Japanese calendarKōnin 2
Javanese calendar707–708
Julian calendar811
Korean calendar3144
Minguo calendar1101 before ROC
Nanakshahi calendar−657
Seleucid era1122/1123 AG
Thai solar calendar1353–1354
Tibetan calendar阳金虎年
(male Iron-Tiger)
937 or 556 or −216
    — to —
(female Iron-Rabbit)
938 or 557 or −215
Battle of Vărbitsa Pass near Pliska (811)
Krum feasts his victory over Nikephoros I

Year 811 (DCCCXI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar, the 811th year of the Common Era (CE) and Anno Domini (AD) designations, the 811th year of the 1st millennium, the 11th year of the 9th century, and the 2nd year of the 810s decade.


By place[edit]

Byzantine Empire[edit]

  • Byzantine–Bulgarian War: Emperor Nikephoros I organises a new campaign against the Bulgarian Empire, gathering an expeditionary force (most of the Roman army) from all parts of the empire. He is accompanied by high-ranking officials and aristocrats, including his son Stauracius and brother-in-law Michael I Rangabe[1] (both later emperors temporarily). Krum, ruler (khan) of Bulgaria, sends envoys to sue for peace. Nikephoros refuses to accept the terms and marches through the Balkan passes towards Pliska, the Bulgarian capital.
  • July 23 – Nikephoros I reaches Pliska, and destroys a Bulgarian army of 12,000 elite soldiers who guard the stronghold. Another hastily assembled relief force of 50,000 soldiers suffers a similar fate.[2] The Byzantines capture the defenseless capital. Nikephoros plunders the city and captures Krum's treasury.[3] He burns the countryside, slaughters sheep and pigs, as he pursues the retreating Bulgars southwest towards Serdica (modern-day Sofia).[4]
  • July 26Battle of Vărbitsa Pass: Nikephoros I is trapped (probably in the Vărbitsa Pass) and defeated by the Bulgars, who use the tactics of ambush and surprise night attacks to immobilize the Byzantine forces. Nikephoros himself is killed; Krum has the emperor's head carried back in triumph on a pole, where it is cleaned out, lined with silver and made into a jeweled skull cup, which he allows his Slavic princes (archons) to drink from with him.[5]
  • Stauracius is installed as emperor at Adrianople (the first time a Byzantine emperor is crowned outside Constantinople). Because of a sword wound near his neck (during the Battle of Pliska), Stauracius is paralyzed. The imperial court is split between the noble factions of his wife Theophano and his sister Prokopia.[6]
  • October 2 – Michael I is declared emperor of the Byzantine Empire; Stauracius is forced by senior officials to retire to a monastery.[7]


Abbasid Caliphate[edit]




  1. ^ Anonymus Vaticanus, p. 148.
  2. ^ Anonymus Vaticanus, pp. 148-149.
  3. ^ Anastasius Bibliothecarius. Chronographia tripertita, p. 329.
  4. ^ Anonymus Vaticanus, p. 150.
  5. ^ Fine, John V. A. Jr. (1991) [1983]. The Early Medieval Balkans: A Critical Survey from the Sixth to the Late Twelfth Century. Ann Arbor: University of Michigan Press. ISBN 0-472-08149-7.
  6. ^ Treadgold, Warren (1997). A History of the Byzantine State and Society. Stanford, California: Stanford University Press. p. 429. ISBN 0-8047-2630-2.
  7. ^ Treadgold, Warren (1997). A History of the Byzantine State and Society. Stanford, California: Stanford University Press. p. 429. ISBN 0-8047-2630-2.