Editing 1255 (section)

==== England ====
* June &ndash; [[Battle of Bryn Derwin]]: [[Llywelyn ap Gruffudd]] defeats his two brothers [[Dafydd ap Gruffydd]] and [[Owain Goch ap Gruffydd]], to become sole ruler of northern [[Wales]]. Dafydd and Owain are both imprisoned.<ref name="CBH1255">{{cite book|last=Palmer|first=Alan|last2=Palmer |first2=Veronica|year=1992|title=The Chronology of British History|publisher=Century Ltd|location=London|pages=84–86|isbn=0-7126-5616-2}}</ref>
* August &ndash; Following the death of [[Little Saint Hugh of Lincoln|Little Saint Hugh]], in an instance of [[Blood libel#Medieval|blood libel]], eighteen Jews of [[Lincoln, England|Lincoln]], are tortured and executed by royal command on suspicion of being involved in the boy's murder.<ref name="CBH1255" />
* A survey of royal privileges is conducted, which is included in the [[Hundred Rolls]], a census seen as a follow-up to the [[Domesday Book]] (completed in [[1086]]). The Hundred Rolls is later completed with two larger surveys, in 1274/75 and 1279/80.<ref>{{cite book|authorlink=Helen Cam|last=Cam|first=Helen|url=https://archive.org/details/studiesinhundred00camh|title=Studies in the hundred rolls: some aspects of thirteenth-century administration|location=Oxford|publisher=Clarendon Press|year=1921}}</ref>