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|1257 by topic|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1257 in poetry|
|Ab urbe condita||2010|
|Balinese saka calendar||1178–1179|
|English Regnal year||41 Hen. 3 – 42 Hen. 3|
|Chinese calendar||丙辰年 (Fire Dragon)|
3953 or 3893
— to —
丁巳年 (Fire Snake)
3954 or 3894
|- Vikram Samvat||1313–1314|
|- Shaka Samvat||1178–1179|
|- Kali Yuga||4357–4358|
|Japanese calendar||Kōgen 2 / Shōka 1|
|Minguo calendar||655 before ROC|
|Thai solar calendar||1799–1800|
1383 or 1002 or 230
— to —
1384 or 1003 or 231
|Wikimedia Commons has media related to 1257.|
- January – Lambsar Castle in Persia is destroyed by the Mongols.
- March – The Japanese Kōgen era ends, and the Shōka era begins.
- Spring – The Epirote–Nicaean conflict (1257–59) begins.
- June 5 – The city of Kraków is granted Magdeburg rights by Boleslaus V of Poland, having been rebuilt after being nearly destroyed in the Tatar invasions in 1241.
- c. September – 1257 Samalas eruption: Mount Samalas volcano erupts on Lombok Island, Indonesia. One of the largest volcanic eruptions in the past 10,000 years, it creates severe climatic changes across the globe, leading to severe famines and death, and to one of the biggest geopolitical changes across the globe over the next few centuries.
- The second Genoese War breaks out between Genoa and Venice in Outremer, known as the War of Saint Sabas.
- The Mongols take Dai Viet (northern Vietnam).
- Karelians make a campaign to Sweden. The campaign leads Swedish king Valdemar to request Pope Alexander IV to declare a crusade against Karelians, which leads to the third Swedish crusade to Finland.
- Władysław Opolski founds the Franciscan monastery in the city of Wodzisław Śląski. Before this date Wodzisław was granted Magdeburg rights (1246–1257).
- Louis IX of France confirms the foundation by his chaplain Robert de Sorbon of the College of Sorbonne in Paris, giving a formal college (and still-common name) to the already existing University of Paris.
- King Henry III of England orders the production of a twenty pence English coin of pure gold, the first high-denomination coin minted in England, and the first to use gold. Unfortunately, the bullion value of the coins is about 20% higher than the nominal face value, leading to poor circulation, as coins are melted down by individuals for their gold content.
- Matthew Paris, English historian, personally interviews King Henry III of England for an entire week while compiling his major work of English history, Chronica Majora.
- Aberdeen Grammar School is founded in Scotland.
- April 28 – Shajar al-Durr, sovereign sultana of Egypt
- June 4 – Duke Przemysł I of Greater Poland (b. 1220/1)
- August 15 – Hyacinth of Poland, friar, "Apostle of the North", canonized (b. c.1185)
- December 24 – John I, Count of Hainaut (b. 1218)
- Amos, Jonathan (September 30, 2013). "Mystery 13th Century eruption traced to Lombok, Indonesia". BBC News. BBC. Retrieved September 30, 2013.
- Alberge, Dalya (August 4, 2012). "Mass grave in London reveals how volcano caused global catastrophe". The Guardian. London.
- "La fondation de la Sorbonne au Moyen Âge par le théologien Robert de Sorbon". La Chancellerie des Universités de Paris. Retrieved March 4, 2021.