Explore 22 historical events from 840–849.
Louis II, sometimes called the Younger, was the king of Italy and emperor of the Carolingian Empire from 844, co-ruling with his father Lothair I until 855, after which he ruled al…
Louis II is crowned as king of Italy at Rome by pope Sergius II
Judith of Bavaria was the Carolingian empress as the second wife of Louis the Pious. Marriage to Louis marked the beginning of her rise as an influential figure in the Carolingian …
Judith of Bavaria, Frankish empress
Empress Dowager Xiao (蕭太后), formally Empress Zhenxian, known at times in her life as Empress Dowager Jiqing (積慶太后), was an empress dowager of the Chinese Tang dynasty. She was the …
Xiao, empress of the Tang Dynasty
Emperor Wuzong of Tang, né Li Chan, later changed to Li Yan just before his death, was an emperor of the Tang dynasty of China, reigning from 840 to 846. Emperor Wuzong is mainly k…
Wuzong, Chinese emperor (born 814)
Methodius I of Constantinople or Methodios I was Ecumenical Patriarch of Constantinople from 11 March 843 to 14 June 847. He was born in Syracuse and died in Constantinople. His fe…
Methodius I, patriarch of Constantinople
Otgar, Otger or Odgar is a Germanic masculine given name. It may refer to:Saint Otger, missionary Autchar, Frankish nobleman Otgar of Mainz, archbishop (826–847) Otgar, bishop of E…
Odgar, Frankish archbishop of Mainz
Louis the Pious, also called the Fair and the Debonaire, was King of the Franks and co-emperor with his father, Charlemagne, from 813. He was also King of Aquitaine from 781. As th…
Louis the Pious, Carolingian emperor (born 778)
Rorgon I or Rorico(n) I was the first count of Maine and progenitor of the Rorgonid dynasty, which is named for him. He was count of Rennes from 819 and of Maine from 832 until his…
Rorgon I, Frankish nobleman (or 839)
The three-year Carolingian Civil War culminated in the decisive Battle of Fontenoy, also called the Battle of Fontenoy-en-Puisaye, fought at Fontenoy, near Auxerre, on 25 June 841.…
In the Battle of Fontenay-en-Puisaye, forces led by Charles the Bald and Louis the German defeat the armies of Lothair I
Emperor Junna was the 53rd emperor of Japan, according to the traditional order of succession. Junna reigned from 823 to 833. He is also known as Emperor Saiin.
Junna, emperor of Japan (born 785)
Walafrid, alternatively spelt Walahfrid, nicknamed Strabo, was an Alemannic Benedictine monk and theological writer who lived on Reichenau Island in southern Germany.
Walafrid Strabo, German monk and theologian (born 808)
Otgar, Otger or Odgar is a Germanic masculine given name. It may refer to:Saint Otger, missionary Autchar, Frankish nobleman Otgar of Mainz, archbishop (826–847) Otgar, bishop of E…
Odgar, Frankish archbishop of Mainz
Empress Dowager Xiao (蕭太后), formally Empress Zhenxian, known at times in her life as Empress Dowager Jiqing (積慶太后), was an empress dowager of the Chinese Tang dynasty. She was the …
Xiao, empress of the Tang Dynasty
Methodius I of Constantinople or Methodios I was Ecumenical Patriarch of Constantinople from 11 March 843 to 14 June 847. He was born in Syracuse and died in Constantinople. His fe…
Methodius I, patriarch of Constantinople
Abū Jaʿfar Hārūn ibn Muḥammad al-Wathiq bi'Llah, commonly known by his regnal name al-Wathiq bi'Llah, was an Abbasid caliph who reigned from 842 until his death in 847.
Al-Wathiq, Abbasid caliph (born 816)
Emperor Wuzong of Tang, né Li Chan, later changed to Li Yan just before his death, was an emperor of the Tang dynasty of China, reigning from 840 to 846. Emperor Wuzong is mainly k…
Wuzong, Chinese emperor (born 814)
Li Shen (李紳), courtesy name Gongchui (公垂), formally Duke Wensu of Zhao (趙文肅公), was a Chinese historian, military general, poet, and politician of the Tang dynasty, serving as a cha…
Li Shen, chancellor of the Tang Dynasty
Sugawara no Michizane , or Kankō , was a scholar, poet, and politician of the Heian period of Japan. He is regarded as an excellent poet, particularly in waka and kanshi poetry, an…
Sugawara no Michizane, Japanese scholar and politician (died 903)
Louis II, sometimes called the Younger, was the king of Italy and emperor of the Carolingian Empire from 844, co-ruling with his father Lothair I until 855, after which he ruled al…
Louis II is crowned as king of Italy at Rome by pope Sergius II
Viking expansion was the historical movement, beginning in the 8th century, which led Vikings to sail most of the North Atlantic, reaching south as far as North Africa and east as …
Viking expansion: A Viking fleet arrived near Seville, then part of the Emirate of Córdoba, and began a raid of the…
Vikings were active in Brittany during the Middle Ages, even occupying a portion of it for a time. Throughout the 9th century, the Bretons faced threats from various flanks: they r…
The Vikings sack the French city of Nantes
Judith of Bavaria was the Carolingian empress as the second wife of Louis the Pious. Marriage to Louis marked the beginning of her rise as an influential figure in the Carolingian …
Judith of Bavaria, Frankish empress
Emperor Saga was the 52nd emperor of Japan, according to the traditional order of succession. Saga's reign lasted from 809 to 823.
Saga, Japanese emperor (born 786)
Prince Abo was a Japanese imperial prince of the early Heian period.
Abo, Japanese prince (born 792)
The three-year Carolingian Civil War culminated in the decisive Battle of Fontenoy, also called the Battle of Fontenoy-en-Puisaye, fought at Fontenoy, near Auxerre, on 25 June 841.…
In the Battle of Fontenay-en-Puisaye, forces led by Charles the Bald and Louis the German defeat the armies of Lothair I
Gerard was Count of Auvergne from 839 until his death on 25 June 841.
Gerard of Auvergne, Frankish nobleman
Ricwin, Ricuin, Richwin, or Richovin was the Count of Nantes from 831 to 841. A Rihwinus comes witnessed the will of Charlemagne in 811.
Ricwin of Nantes, Frankish nobleman
Shi Yuanzhong was a Chinese general of the Tang dynasty, serving for several years as the military governor (Jiedushi) of Lulong Circuit and ruling it in de facto independence from…
Shi Yuanzhong, Chinese governor
Ya'qub ibn al-Layth Saffar was a coppersmith and the founder of the Saffarid dynasty of Sistan, with its capital at Zarang. Under his military leadership, he conquered much of the …
Ya'qub ibn al-Layth al-Saffar, founder of the Saffarid dynasty (died 879)
Emperor Junna was the 53rd emperor of Japan, according to the traditional order of succession. Junna reigned from 823 to 833. He is also known as Emperor Saiin.
Junna, emperor of Japan (born 785)
Rorgon I or Rorico(n) I was the first count of Maine and progenitor of the Rorgonid dynasty, which is named for him. He was count of Rennes from 819 and of Maine from 832 until his…
Rorgon I, Frankish nobleman (or 839)
Louis the Pious, also called the Fair and the Debonaire, was King of the Franks and co-emperor with his father, Charlemagne, from 813. He was also King of Aquitaine from 781. As th…
Louis the Pious, Carolingian emperor (born 778)