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Decade
The 840s decade ran from January 1, 840, to December 31, 849. June 20 – Louis the Pious, Emperor of the Romans and King of the Franks, falls ill and dies
840s
Decade
Centuries 10th century BC 9th century BC 8th century BC Decades 860s BC 850s BC 840s BC 830s BC 820s BC Years 849 BC 848 BC 847 BC 846 BC 845 BC 844 BC 843 BC
840s_BC
One hundred years, from 900 BC to 801 BC
9th century BC 8th century BC Decades 890s BC 880s BC 870s BC 860s BC 850s BC 840s BC 830s BC 820s BC 810s BC 800s BC Categories: Births – Deaths Establishments
9th_century_BC
Ruined fortress in Russia
River. It was built by the Khazars with Byzantine assistance in the 830s or 840s. It was named Sarkel, or 'white-house', because of the white limestone bricks
Sarkel
Country primarily in Western Europe
France, officially the French Republic, is a country primarily located in Western Europe. Its overseas regions and territories include French Guiana in
France
Events from the 9th century in Ireland. 802 Death of Muiredach mac Domnaill, King of Mide. He is succeeded by Diarmait mac Donnchado. 803 Death of Diarmait
9th_century_in_Ireland
This article covers 840s in poetry. Nationality words link to articles with information on the nation's poetry or literature (for instance, Irish or France)
840s_in_poetry
Natural number
800 (eight hundred) is the natural number following 799 and preceding 801. It is the sum of four consecutive primes (193 + 197 + 199 + 211). It is a Harshad
800_(number)
Calendar year
1st millennium, the 40th year of the 9th century, and the 1st year of the 840s decade. June 20 – Louis the Pious, Emperor of the Romans and King of the
840
King (823–826), also King of Mercia Æthelstan, King post-827–840s) Æthelweard, King (840s–854) Edmund the Martyr, King (855–869) Oswald, Sub-King (870s)
List of state leaders in the 9th century
List_of_state_leaders_in_the_9th_century
Imperial dynasty of China (618–907)
Chinese culture, with native Chinese sects gaining prominence. However, in the 840s, Emperor Wuzong enacted policies to suppress Buddhism, which subsequently
Tang_dynasty
High office in the Roman Empire
last traces of the prefecture disappeared in the Byzantine Empire by the 840s. The term praefectus praetorio was often abbreviated in inscriptions as "PR
Praetorian_prefect
Western European kingdom (c. 481–843)
The Kingdom of the Franks (Latin: Regnum Francorum), also known as the Frankish Kingdom or Francia, was the largest post-Roman kingdom in Western Europe
Francia
Early Medieval royal family
Dál Riata before he contended successfully for power in Pictland in the 840s, following the death of Eóganán mac Óengusa, is supported by nearly contemporary
House_of_Alpin
Celtic ethnolinguistic group
attacks continued for some time until the Norsemen began to settle in the 840s at Dublin (setting up a large slave market), Limerick, Waterford and elsewhere
Gaels
Assyrian history (911–609 BCE)
king; a surviving work of art depicts the two rulers shaking hands. In the 840s and 830s BCE, Shalmaneser again campaigned in Syria and succeeded in receiving
Neo-Assyrian_Empire
Calendar year
1st millennium, the 42nd year of the 9th century, and the 3rd year of the 840s decade. January 20 – Emperor Theophilos dies of dysentery at Constantinople
842
Medieval Armenian principality
century–870s Capital Tephrike Religion Paulicianism Government Monarchy • 840s - 863 Karbeas • 863 - 870s Chrysocheres History • Established mid 9th century
Paulician principality of Tephrike
Paulician_principality_of_Tephrike
Sixth king of the Kingdom of Judah
Ahaziah of Judah (Hebrew: אֲחַזְיָהוּ, romanized: ʼĂḥazyāhū; Greek: Ὀχοζίας Okhozias; Latin: Ahazia) or Jehoahaz I (2 Chronicles 21:17; 25:23), was the
Ahaziah_of_Judah
Viking siege of Paris in 845
informed about the political situation in France; in the 830s and early 840s they took advantage of the Frankish civil wars. Large raids took place in
Siege_of_Paris_(845)
King of Kent
of Surrey". He attested a number of his father's charters as king in the 840s. In 851, Æthelstan and Ealdorman Ealhhere defeated a Viking fleet and army
Æthelstan_of_Kent
Medieval tribal confederation in northern Britain
King of Dál Riata Áed mac Boanta, and many others. In the aftermath, in the 840s, Kenneth MacAlpin (Medieval Gaelic: Cináed mac Ailpín) became king of the
Picts
9th-century rebel leader against the Abbasids
Abū Ḥarb al-Yamānī (Arabic: أبو حرب اليماني) or, according to Ya'qubi, Tamīm al-Lak̲h̲mī (Arabic: تميم اللخمي), better known by his laqab of al-Mubarqaʿ
Al-Mubarqa
King of Wessex from 839 to 858
London; the two kingdoms appear to have struck a joint issue in the mid-840s, possibly indicating West Saxon help in reviving Mercian coinage, and showing
Æthelwulf,_King_of_Wessex
Medieval cultural group from what is now Northern Germany
against Frankish overlordship in favour of their old paganism as late as the 840s, when the Stellinga rose up against the Saxon leadership, who were allied
Saxons
Power in East Asia from 618 to 842/848
The Tibetan Empire (Tibetan: བོད་ཆེན་པོ, Wylie: bod chen po, lit. 'Great Tibet') was centered on the Tibetan Plateau and formed as a result of expansions
Tibetan_Empire
Grand Prince of the Hungarians from c. 895 to 907
Árpád (Hungarian pronunciation: [ˈaːrpaːd]; c. 845 – c. 907) was the head of the confederation of the Magyar tribes at the turn of the 9th and 10th centuries
Árpád
Decade
10th century BC 9th century BC 8th century BC Decades 880s BC 870s BC 860s BC 850s BC 840s BC Years 869 BC 868 BC 867 BC 866 BC 865 BC 864 BC 863 BC 862 BC 861 BC 860 BC
860s_BC
BC 910s BC 900s BC 9th century BC 890s BC 880s BC 870s BC 860s BC 850s BC 840s BC 830s BC 820s BC 810s BC 800s BC 8th century BC 790s BC 780s BC 770s BC
List of decades, centuries, and millennia
List_of_decades,_centuries,_and_millennia
This is a list of lists of births of notable people, organised by year. New births articles are added to their respective year (e.g., 2026#Births) and
Lists_of_births_by_year
845 AD battle between West Francia and the Duchy of Brittany
The Battle of Ballon took place on 22 November 845 between the forces of Charles the Bald, king of West Francia, and Nominoë, Duke of Brittany. Nominoë
Battle_of_Ballon
King of the East Angles from c.845 to 854
king is uncertain, but it is conventionally dated to the middle or late 840s. It appears that he died in 854. He was succeeded as king by his fourteen-year-old
Æthelweard_of_East_Anglia
The battle of the Ries of 13 May 841 was a major engagement of the Carolingian civil war of 840–843. King Louis the German surprised and routed the army
Battle_of_the_Ries
The Battle of Sansego was a naval engagement between the Venetians and the Aghlabids off the island of Sansego. The Venetians suffered a crushing defeat
Battle_of_Sansego
Topics referred to by the same term
to: Æthelred II of East Anglia, king 870s Æthelred II of Northumbria, king 840s/850s This disambiguation page lists articles about people with the same name
Æthelred_II_(disambiguation)
King of the Danes
of his long reign. Though Harald survived as a Frankish protégé until the 840s he was not able to seriously disturb Horik. It is not known exactly when
Horik_I
Feudal monarchy in southern France (778–1271)
the Toulouse region under the sovereignty of the king of Francia in the 840s. Over time his descendants gained more power over the region compared to
County_of_Toulouse
I, ruler of Duchy of Croatia (845–864); erroneously by Gottschalk in the 840s Svatopluk I of Moravia, ruler of Great Moravia (870–894); by Pope Stephen
King_of_the_Slavs
Decade
10th century BC 9th century BC 8th century BC Decades 870s BC 860s BC 850s BC 840s BC 830s BC Years 859 BC 858 BC 857 BC 856 BC 855 BC 854 BC 853 BC 852 BC
850s_BC
Cross-border cultural region in Northwestern Europe
The Frisian coastal areas were partly occupied by Danish Vikings in the 840s, until these were expelled between 885 and 920. Recently, it has been suggested
Frisia
King of Hamath
Hama. Museum of the Ancient Orient, Istanbul. King of Hamath Reign c. 850s–840s BCE Predecessor Parita Successor Uratami/Rudamu Born c. early 9th century
Irhuleni
This culminated in the rise of Cínaed mac Ailpín (Kenneth MacAlpin) in the 840s, which brought to power the House of Alpin. In 867 AD the Vikings seized
History_of_Scotland
consolidated its holdings in northern Italy through the 820s, 830s, and 840s, often controlling the counties of Brescia (hereditarily), Parma, Cremona
Supponids
Historical period of Albania
centuries. Most of Albania became part of the First Empire in the early 840s during the reign of Khan Presian. Some coastal towns such as Durrës remained
Albania under the Bulgarian Empire
Albania_under_the_Bulgarian_Empire
Predecessor of France from 843 to 987
In medieval historiography, West Francia (Medieval Latin: Francia occidentalis) or the Kingdom of the West Franks (Latin: regnum Francorum occidentalium)
West_Francia
Vikings were expert sailors, who travelled in longships, and by the early 840s, had begun to establish settlements along the Irish coasts and to spend the
History_of_Ireland
Fourth king of the Kingdom of Judah
Jehoshaphat (/dʒəˈhɒʃəfæt/; alternatively spelled Jehosaphat, Jehosophat, Josaphat, or Yehoshafat; Hebrew: יְהוֹשָׁפָט, Modern: Yəhōšafaṭ, Tiberian: Yŏhōšāp̄āṭ
Jehoshaphat
Viscount of Chu (died 847 BC)
Xiong Yan (Chinese: 熊延) was a ruler of the Chu state. Xiong Yan succeeded his older brother, Xiong Zhi, who abdicated due to illness. The Records of the
Xiong_Yan_(elder)
9th-11th century province of Lotharingia/Middle Francia
Teisterbant was a pagus (province) of Lotharingia/Middle Francia. It was located in the present-day Netherlands, bordered by the rivers Lek and Waal. Modern-day
Teisterbant
Gaelic kingdom in western Scotland and northeastern Ireland
Dál Riata or Dál Riada (also Dalriada) (/dælˈriːədə/) was a Gaelic kingdom that encompassed the western seaboard of Scotland and north-eastern Ireland
Dál_Riata
Hungarian-American physicist and inventor (1898–1964)
Zeitschrift für Physik (in German). 53 (11–12): 840–856. Bibcode:1929ZPhy...53..840S. doi:10.1007/BF01341281. ISSN 0044-3328. S2CID 122038206. Available on-line
Leo_Szilard
Tahirid governor of Khorasan from 828 to 845
Abdallah ibn Tahir (Persian: عبدالله طاهر, Arabic: عبد الله بن طاهر الخراساني) (ca. 798–844/5) was a military leader and the Tahirid governor of Khurasan
Abdallah ibn Tahir al-Khurasani
Abdallah_ibn_Tahir_al-Khurasani
Calendar year
Years Millennium 1st millennium Centuries 8th century 9th century 10th century Decades 830s 840s 850s 860s 870s Years 850 851 852 853 854 855 856 v t e
853
Calendar year
Years Millennium 1st millennium Centuries 8th century 9th century 10th century Decades 800s 810s 820s 830s 840s Years 826 827 828 829 830 831 832 v t e
829
Norse explorer (c. 849 – c. 910)
Ingólfr Arnarson, in some sources named Björnólfsson, (c. 849 – c. 910) is commonly recognized as the first Icelander, when he became the first Norse settler
Ingólfr_Arnarson
counts) of Capua were vassals of the princes of Benevento until the early 840s, when Gastald Landulf began to clamour for the independence which Salerno
List_of_princes_of_Capua
Anglo-Saxon noble from Mercia
the son of another Mucel who witnessed Mercian charters from 814 to the 840s. He is described by Asser as an ealdorman of the Gaini, a tribe after whom
Æthelred_Mucel
Arab Emir of Malatya from the 830s to 863
victory over Theophilos himself at the Battle of Anzen in July 838. In the 840s, he provided refuge to the surviving members of the Paulicians, who were
Umar_al-Aqta
This is a timeline of the Tang dynasty. Information on areas and events relevant to the Tang dynasty such as the Wu Zhou interregnum, when Wu Zetian established
Timeline_of_the_Tang_dynasty
Main airport serving Shetland, Scotland
a private garden in North Roe in the north of Shetland. Only eight Potez 840s were built. 6 November 1986: British International Helicopters Chinook crash
Sumburgh_Airport
Provincial Abbasid governor
Caliphate in the ninth century, serving as governor of Raqqa (833), al-Sind (c. 840s) and Egypt (852–856). He was the last Arab to hold the governorship of Egypt
Anbasah_ibn_Ishaq_al-Dabbi
Byzantine province in the northern Aegean Sea
The Theme of the Aegean Sea (Greek: θέμα τοῦ Αἰγαίου Πελάγους, thema tou Aigaiou Pelagous) was a Byzantine province in the northern Aegean Sea, established
Aegean_Sea_(theme)
9th-century Count of Metz and Mozelgau
Adalhard II (c. 840 – 2 January (?) 890) was Count of Metz and Mozelgau. He was probably the son of Adalard the Seneschal. Adalard is mentioned in documents
Adalhard_of_Metz
Decade
1st millennium Centuries 8th century 9th century 10th century Decades 830s 840s 850s 860s 870s Years 850 851 852 853 854 855 856 857 858 859 Categories Births
850s
844 battle of the Arab-Byzantine Wars
The Battle of Mauropotamos (Greek: Μάχη τοῦ Μαυροποτάμου) was fought in 844, between the armies of the Byzantine Empire and the Abbasid Caliphate, at Mauropotamos
Battle_of_Mauropotamos
Calendar year
Years Millennium 1st millennium Centuries 8th century 9th century 10th century Decades 830s 840s 850s 860s 870s Years 851 852 853 854 855 856 857 v t e
854
Calendar year
Years Millennium 1st millennium Centuries 8th century 9th century 10th century Decades 810s 820s 830s 840s 850s Years 833 834 835 836 837 838 839 v t e
836
Georgian medieval Orthodox monastery in Artvin, Turkey
is an illustration of the activity of St. Gregory's followers. Founded in 840s as a hermitage, it soon turned into a coenobium. Monastic buildings are sheltered
Parekhi
Island off the coast of Vendée, France
island around 824, from which they could control southeast Brittany by the 840s. In 848, they sacked Bordeaux. From 862 until 882, Hastein used it as a base
Noirmoutier
Abbasid army commander (845/6–933)
Abū'l-Ḥasan Mu'nis al-Qushuri (Arabic: أبو الحسن مؤنس القشوري; 845/6—933), also commonly known by the surnames al-Muẓaffar (المظفر; lit. 'the Victorious')
Mu'nis_al-Muzaffar
744–840 Turkic empire in East Asia
significant political or military presence there after their victories in the 840s. — Michael Drompp After the fall of the Uyghur Khaganate, the Uyghurs migrated
Uyghur_Khaganate
Calendar year
Years Millennium 1st millennium Centuries 8th century 9th century 10th century Decades 800s 810s 820s 830s 840s Years 822 823 824 825 826 827 828 v t e
825
9th-century Slavic state
independence caused a series of armed conflicts with East Francia from the 840s. According to most historians, the core territories of Moravia were located
Great_Moravia
King of Wessex from 860 to 865
allowed to issue their own coinage. Viking raids increased in the early 840s on both sides of the English Channel, and in 843 Æthelwulf was defeated by
Æthelberht,_King_of_Wessex
Decade
Centuries 10th century BC 9th century BC 8th century BC Decades 850s BC 840s BC 830s BC 820s BC 810s BC Years 839 BC 838 BC 837 BC 836 BC 835 BC 834 BC
830s_BC
Calendar year
Years Millennium 1st millennium Centuries 8th century 9th century 10th century Decades 800s 810s 820s 830s 840s Years 817 818 819 820 821 822 823 v t e
820
Greek Orthodox monastery in the West Bank
John of Damascus (676–749), and the brothers Theodorus and Theophanes (770s–840s). The monastery is vital in the historical development of the liturgy of
Mar_Saba
Biblical figure; Phoenician princess and wife of Ahab
Jezebel (/ˈdʒɛzəbəl, -bɛl/) was the daughter of Ithobaal I of Tyre and the wife of Ahab, King of Israel, according to the Book of Kings of the Hebrew Bible
Jezebel
The Viking raid on Galicia and Asturias occurred in 844. Many longships were lost in the attack and the fleet retreated to Aquitaine. In 844, the Vikings
Viking raid on Galicia and Asturias
Viking_raid_on_Galicia_and_Asturias
Head of the Catholic Church from 900 to 903
Pope Benedict IV (Latin: Benedictus IV; c. 840 – 30 July 903) was the bishop of Rome and ruler of the Papal States from 1 February 900 to his death. The
Pope_Benedict_IV
Noble Byzantine family
the area around Melitene, where a member of the family was active in the 840s, and where the rebellions of Bardas Skleros in the 970s and 980s were centred
Skleros
9th-century Viking king of Dublin
larger realms of Munster and Leinster. At the beginning of his reign in the 840s, Cerball's allegiance was pledged to the over-king of Munster, but as that
Ímar
Buddhist temple in Misasa, Japan
35°23′57.55″N 133°57′20.74″E / 35.3993194°N 133.9557611°E / 35.3993194; 133.9557611 Sanbutsu-ji (三仏寺, Sanbutsu-ji) is a Buddhist temple in the town
Sanbutsu-ji
King of Wessex from 865 to 871
allowed to issue their own coinage. Viking raids increased in the early 840s on both sides of the English Channel, and in 843 Æthelwulf was defeated at
Æthelred_I_of_Wessex
Millennium spanning the years 1 to 1000
720s 730s 740s 750s 760s 770s 780s 790s 9th century 800s 810s 820s 830s 840s 850s 860s 870s 880s 890s 10th century 900s 910s 920s 930s 940s 950s 960s
1st_millennium
Gelling and thickening agent
Bacteriological Media". Appl Environ Microbiol. 46 (4): 840–5. Bibcode:1983ApEnM..46..840S. doi:10.1128/aem.46.4.840-845.1983. PMC 239477. PMID 16346398. Gao, Chang
Gellan_gum
Earthquake affecting Syria and Lebanon
The 847 Damascus earthquake occurred (probably on 24 November) in AD 847. Recent scholarship suggests that the earthquake was part of a multiple earthquake
847_Damascus_earthquake
9th-century Abbasid military general and governor
Khalid ibn Yazid al-Shaybani (in Arabic خالد بن يزيد الشيباني) was an Arab general and governor for the Abbasid Caliphate, active in the second quarter
Khalid_ibn_Yazid_al-Shaybani
Thought experiment of 1867
beings)". Zeitschrift für Physik. 53 (11–12): 840–856. Bibcode:1929ZPhy...53..840S. doi:10.1007/bf01341281. S2CID 122038206. cited in Bennett 1987. English
Maxwell's_demon
Ruler of Qin
The Marquis of Qin (Chinese: 秦侯; pinyin: Qín Hóu, died 848 BC) was the second ruler of the state of Qin, founded when his father Feizi was granted a small
Marquis_of_Qin
State in Western Europe from 843 to 855
Middle Francia (Latin: Francia media) was a short-lived Frankish kingdom which was created in 843 by the Treaty of Verdun, which ended nearly three years
Middle_Francia
Dynasty in northwest China (1038–1227)
raids on Tang garrisons. Sporadic conflict with the Tanguts lasted until the 840s when they rose in open revolt against the Tang, but the rebellion was suppressed
Western_Xia
9th-century King of Wessex
filius regis (the king's son). He attested with the same designation in the 840s, to S 300 in 850 as dux filius regis and in the early 850s as dux (ealdorman)
Æthelbald,_King_of_Wessex
King of Wessex (871 – c. 886); King of the Anglo-Saxons (c. 886 – 899)
allowed to issue their own coinage. Viking raids increased in the early 840s on both sides of the English Channel, and in 843 Æthelwulf was defeated at
Alfred_the_Great
Musa ibn Yahya, who he succeeded as governor Anbasah ibn Ishaq al-Dabbi 840s Deputy governor for Itakh al-Turki Harun ibn Abi Khalid al-Marwrudhi to 854
List_of_monarchs_of_Sindh
Mediterranean naval battle of 849
The naval Battle of Ostia took place in 849 in the Tyrrhenian Sea between a Muslim fleet and an Italian league of Papal, Neapolitan, Amalfitan, and Gaetan
Battle_of_Ostia
Sovereign state in Europe (843–1707)
rise of Cínaed mac Ailpín (Kenneth MacAlpin) as "king of the Picts" in the 840s (traditionally dated to 843), and brought to power the House of Alpin. Under
Kingdom_of_Scotland
Frenkish count (881–886)
in the county. An earlier Count Bernard was active in the Auvergne in the 840s, but has no known connection to Ermengard. Instead, she was perhaps daughter
Bernard_Plantapilosa
Decade
1st millennium Centuries 8th century 9th century 10th century Decades 810s 820s 830s 840s 850s Years 830 831 832 833 834 835 836 837 838 839 Categories Births Deaths
830s
Anglo-Saxon tribe which occupied part of the kingdom of Mercia
Mercian charters between 814 and 866, with two subscribing in the 830s and 840s. They may be father and son, with the later one being Ealhswith's father
Gaini
840S
840S
840S
840S
840S
840S
840S
840S
840S