Year 842 (DCCCXLII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar.

Events

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By place

Europe

• February 14 – Charles the Bald and Louis the German sign a treaty.
• Cerball mac D nlainge becomes king of Osraige
• The Oaths of Strasbourg, an alliance of Louis the German and Charles the Bald against emperor Lothar, are sworn and recorded in the vernacular languages.
• Ramiro I succeeds Alfonso II as king of Asturias.
• Uurad is succeeded by Bred, then Ciniod as King of the Picts.
• Charles the Bald marries Ermentrude.

Byzantine Empire

• Three year old Michael III succeeds Theophilus (emperor) as emperor of Byzantium.

Asia

• The reign of caliph Al-Mu'tasim ends.
• The Uyghurs leave the Mongolian plateau.

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Births

Deaths

• January 5 – Al-Mu'tasim, Abbasid caliph (b. 794)
• January 20 – Theophilos, Byzantine Emperor (b. 813)
• Emperor Saga of Japan (b. 786)
• Alfonso II of Asturias (b. 759)
• Liu Yuxi, Chinese poet, philosopher, and essayist (b. 772)

References

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