Pope Clement IV (Latin: Clemens IV; 23 November 1190/1200 – 29 November 1268), born Guy Foucois called in later life le Gros (Guy Foulques the Fat; Italian: Guido Fulcodi il Grosso), was Pope from 5 February 1265 to his death in 1268.He was elected in an election held at Perugia that lasted four months while cardinals argued over whether to call in Charles of Anjou, the youngest brother of King Louis IX of France to carry on the papal war against the imperial house of Hohenstaufen.