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Hulagu's army attacks Baghdad.
1258 ( ) was a MCCLVIII common year starting on Tuesday (link will display the full calendar) of the Julian calendar.
By area [ edit ]
The observed effects of an eruption of the Indonesian volcano
Mount Rinjani, in late 1257, include the following anecdotal accounts: dry fog in France; lunar eclipses in England; severe winter in Europe; a "harsh" spring in northern Iceland; famine in England, western Germany, France, and northern Italy; and pestilence in London, parts of France, Austria, Iraq, Syria, and southeast Turkey. 
February 10 – The Siege of Baghdad ends with a battle, in which Hulagu Khan's Mongol forces overrun Baghdad, then the leading center of Islamic culture and learning, and capital of the Abbasid Caliphate. They burn the imperial city to the ground, killing as many as 1,000,000 citizens, and destroy the House of Wisdom, containing countless precious historical documents, and books on subjects ranging from medicine to astronomy. The
Chinese era Baoyou ends, in the Southern Song Dynasty of China. Korea surrenders to the
Mongols, ending the effective resistance of the Choe faction within Korea. The
Mongol Empire invades the Đại Việt (present-day northern Vietnam).
May 11 – The Treaty of Corbeil is signed between James I of Aragon and Louis IX of France. The French king, as the heir of Charlemagne, formally renounces his feudal overlordship over Catalonia (independent de facto since 988), while the Aragonese king renounces his claims over Occitania.
August 25 – George Mouzalon, regent of the Empire of Nicaea, is assassinated in Magnesia ad Sipylum, as part of a conspiracy led by nobles, under future emperor Michael VIII Palaiologos.
Llywelyn ap Gruffudd declares himself Prince of Wales. He is the final ruler of an independent Wales, before its conquest by the English. King
Henry III of England is forced by seven powerful barons to accept the . Provisions of Oxford
Gissur Þorvaldsson is made Earl of Iceland, by King Haakon IV of Norway. The Mongol
Golden Horde attacks Lithuania. The
Battle of Karydi ends the War of the Euboeote Succession in a crushing victory for William II of Villehardouin, Prince of Achaea.
By topic [ edit ]
Markets [ edit ]
Genoa, the Republic starts imposing forced loans, known as luoghi, to its taxpayers; they are a common resource of medieval public finance. 
Religion [ edit ]
February – Sulaiman Shah, Abbasid soldier
February 20 – Al-Musta'sim, last Abbasid Caliph of Baghdad
April 5 – Saint Juliana of Liège
June 2 – Peter I, Count of Urgell
July 22 – Meinhard I, Count of Gorizia-Tyrol (b. c. 1200) (alternative date is February)
August 18 – Theodore II Laskaris, emperor of Nicea ( Byzantine emperor in exile)
August 25 – George Mouzalon, regent of the Empire of Nicaea
November 10 – William de Bondington, Bishop of Glasgow
Abul Hasan ash-Shadhili, Moroccan spiritual leader (b. 1175)
Clement of Dunblane, first Dominican bishop in Britain
Hong Bok-won, Goryeo commander who later served the Mongol Empire
Ingerd Jakobsdatter, Danish countess (b. 1200)
References [ edit ]
^ Stothers, R.B. (2000) "Climatic and Demographic consequences of the Massive Volcanic Eruption of 1258". Climatic Change, 45, 361–374.
^ Munro, John H. (2003). "The Medieval Origins of the Financial Revolution". The International History Review. 15 (3): 506–562.