Editing 1255 (section)

== Deaths ==
* [[May 1]] &ndash; [[Walter de Gray]], English archbishop and statesman
* [[August 27]] &ndash; [[Little Saint Hugh of Lincoln|Little Saint Hugh]], English Jewish boy (b. [[1246]])
* [[Muhammad al-Faqih al-Muqaddam|Al-Faqih al-Muqaddam]], Yemeni religious leader (b. [[1178]])
* [[Alice, Countess of Bigorre|Alice de Montfort]], French noblewoman and ruler (''[[suo jure]]'')
* [[Batu Khan]], Mongol ruler and founder of the [[Golden Horde]]
* [[Carintana dalle Carceri]], ruler of the [[Principality of Achaea]]
* [[Denis Türje]], Hungarian nobleman and military commander<ref>{{cite book |last=Zsoldos |first=Attila |year=2011 |title=Magyarország világi archontológiája, 1000–1301 ''[Secular Archontology of Hungary, 1000–1301]'' |publisher=História, MTA Történettudományi Intézete |isbn=978-963-9627-38-3 |language=hu |page=296}}</ref>
* [[Eva de Braose]], heiresses and wife of [[William de Cantilupe (died 1254)|William de Cantilupe]]
* [[Helena Pedersdatter Strange]], queen of [[Sweden]] (b. [[1200]])
* [[Majd ad-Din ibn Taymiyyah|Majd al-Din ibn Taymiyyah]], Seljuk judge and theologian 
* [[Prince Masanari|Masanari]], Japanese nobleman and [[Waka (poetry)|''waka'']] poet (b. 1200)
* [[Muhammad III of Alamut|Muhammad III]], ruler of the [[Nizari Ismaili state|Nizari Ismaili State]] (b. [[1211]])
* [[Shams al-Din 'Ali ibn Mas'ud]], Mihrabanid ruler of [[Sistan]]