| Centuries: | 8th century - 9th century - 10th century |
| Decades: | 810s 820s 830s - 840s - 850s 860s 870s |
| Years: | 837 838 839 - 840 - 841 842 843 |
| 840 by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishment and disestablishment categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 840 DCCCXL |
| Ab urbe condita | 1593 |
| Armenian calendar | 289 ԹՎ ՄՁԹ |
| Bahá'í calendar | -1004 – -1003 |
| Berber calendar | 1790 |
| Buddhist calendar | 1384 |
| Burmese calendar | 202 |
| Chinese calendar | 3476/3536-11-23 (己未年十一月廿三日) — to —
3477/3537-12-4(庚申年十二月初四日) |
| Coptic calendar | 556 – 557 |
| Ethiopian calendar | 832 – 833 |
| Hebrew calendar | 4600 – 4601 |
| Hindu calendars | |
| - Vikram Samvat | 895 – 896 |
| - Shaka Samvat | 762 – 763 |
| - Kali Yuga | 3941 – 3942 |
| Holocene calendar | 10840 |
| Iranian calendar | 218 – 219 |
| Islamic calendar | 225 – 226 |
| Japanese calendar | |
| Korean calendar | 3173 |
| Thai solar calendar | 1383 |
Events
By Place
Europe
- After the death of Louis the Pious, his sons Lothar, Charles the Bald and Louis the German fight over the division of the Holy Roman Empire, with Lothar succeeding as Emperor. The pages listed below contain information about trends and events in particular centuries and millennia. The 8th century is the period from 701 to 800 in accordance with the Julian calendar in the Christian / Common Era. The 9th century is the period from 801 to 900 in accordance with the Julian calendar in the Christian / Common Era. See also List of centuries, History This is a list of Decades in history including links to corresponding articles with more information about them Events and Trends 814 — Charlemagne dies transfer of united territory to Louis the Pious 814 – 817 — Events and Trends Egbert of Wessex rises to the position of Bretwalda. Events and Trends The first Swedes arrive in Russia (The Rus', from Roslagen) The Viking raids in Western Europe get more severe Events and Trends 841 — Dublin is founded by Viking settlers of Ireland. Events and trends 850–859 Christian " Martyr Movement " in Córdoba Spain Events and Trends Rurik establishes the state of Novgorod (later Kievan Rus') Basil I has first caesar Bardas Events and Trends The Danes invade England ( 870) and conquer East Anglia. This page indexes the individual Years pages Twenty-first century Events By Place Europe Pietro Tradonico is elected Doge of Venice. Events By Place Europe At Hingston Down, Egbert of Wessex beats the Danish and the West Welsh Events By Place Europe Louis the Pious attempts to divide his empire among his sons Events By Place Europe June 25 - Battle of Fontenay: Louis the German and Charles the Bald defeat Events By Place Europe February 14 - Charles the Bald and Louis the German sign a treaty Events By Place Europe The Treaty of Verdun divides the Carolingian Empire between the 3 sons of Louis the Asia Bohai/Balhae - Da Yizhen/Dae I-jin, King of Bohai/Balhae ( 830 - 857) China The Gregorian calendar is the most widely used Calendar in the world today Ab Urbe condita (literally "from The Armenian calendar is the traditional calendar of Armenia. The Bahá'í calendar, also called the Badí‘ calendar, used by the Bahá'í Faith, is a Solar calendar with regular years of 365 days and Leap The Berber calendar is the annual Calendar used by Berber people in North Africa. The Buddhist calendar is used on mainland Southeast Asia in the countries of Cambodia, Laos, Thailand, Myanmar (formerly Burma The traditional Burmese calendar is a Lunisolar calendar based on both the phases of the moon and the motion of the sun The Chinese calendar is lunisolar, incorporating elements of a Lunar calendar with those of a Solar calendar. The Chinese sexagenary cycle ( is a cyclic numeral system of 60 combinations of the two basic cycles the ten Heavenly Stems (天干 tiāngān The Chinese sexagenary cycle ( is a cyclic numeral system of 60 combinations of the two basic cycles the ten Heavenly Stems (天干 tiāngān The Coptic calendar, also called the Alexandrian calendar, is used by the Coptic Orthodox Church and still used in Egypt The Ethiopian calendar ( Amharic: የኢትዮጵያ ዘመን አቆጣጠር ye'Ītyōṗṗyā zemen āḳoṭaṭer) also called the Ge'ez calendar, The Hebrew calendar (הלוח העברי ha'luach ha'ivri) or Jewish calendar is a Lunisolar calendar used by Jews for predominantly religious The Hindu calendar used in ancient times has undergone many changes in the process of regionalization and today there are several regional Indian Calendars, as The Indian national calendar (sometimes called Saka calendar) is the official civil calendar in use in India. Kali Yuga ( Devanāgarī: sa कलियुग lit "Age of Kali " "age of vice" is one of the four stages of development that the world goes The Iranian calendar or Solar Hejri (تقویم هجری شمسی؛ سالنمای هجری خورشیدی Taqwim Hejri Shamsi Salanmay Hejri Khurshidi) is an astronomical The Islamic calendar or Muslim calendar ( Arabic: التقويم الهجري at-taqwīm al-hijrī; Persian: تقویم هجری قمری Since January 1, 1873, Japan has used the Gregorian calendar, with local names for the months and mostly fixed holidays The traditional Korean calendar is a Lunisolar calendar which like the traditional calendars of other East Asian countries was based on the Chinese calendar The Thai solar calendar, Suriyakati (สุริยคติ has been the official and prevalent Calendar in Thailand since it was adopted by King Louis the Pious (778 &ndash 20 June 840) also called the Fair, and the Debonaire, was the King of Aquitaine from 781 and co-Emperor Lothair I ( German: Lothar, French: Lothaire, Italian: Lotario) (795 &ndash 29 September 855) Charles the Bald ( 13 June 823 – 6 October 877) Holy Roman Emperor (875–877 as Charles II) and King of West Francia Louis (also Ludwig or Lewis) the German (also known as Louis II or Louis the Bavarian) (806 &ndash August 28, 876 The Holy Roman Empire ( HRE; German Heiliges Römisches Reich (HRR, Latin Sacrum Romanum Imperium (SRI was a union of territories in
- Dublin, Ireland is founded by the Vikings. Dublin (ˈdʌblɨn/ /ˈdʊblɨn or /ˈdʊbəlɪn/, bˠalʲə aːha klʲiəh or cliə(ɸ is both the largest city and capital of Ireland. Ireland (pronounced /ˈaɾlənd/ Éire) is the third largest island in Europe, and the twentieth-largest island in the world A Viking is one of the Norse ( Scandinavian Explorers Warriors Merchants, and pirates who raided and colonized wide areas
Asia
- Tang Wu Zong succeeds Tang Wen Zong as emperor of China. Emperor Tang Wuzong (ca 810 – 846 born Li Yan, was the fifteenth emperor of the Tang dynasty of China, reigning from 840 to 846 Emperor Tang Wenzong (唐文宗李昂 809&ndash840 born Li Ang was the 14th emperor of the Tang dynasty of China. China ( Wade-Giles ( Mandarin) Chung¹kuo² is a cultural region, an ancient Civilization, and depending on perspective a National
Deaths
- June 20 — Louis the Pious, King of the Franks, Emperor of the Holy Roman Empire (b. Events 451 - Battle of Chalons: Flavius Aetius ' defeats Attila the Hun. Louis the Pious (778 &ndash 20 June 840) also called the Fair, and the Debonaire, was the King of Aquitaine from 781 and co-Emperor 778)
- Emperor Junna of Japan (b. Events By Place Europe August 15 — Battle of Roncevaux Pass (Roncesvalles Charlemagne 's army suffers a terrible Emperor Junna (淳和天皇 Junna-tennō) (786-840 was the 53rd emperor of Japan, according to the traditional order of succession For a topic outline on this subject see List of basic Japan topics. 786)
- Wiglaf, King of Mercia
- Emperor Wenzong of Tang
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