ir ess ▁of ▁the ▁lord ship ▁of ▁Al bar rac ín . ▁This ▁was ▁a ▁large , ▁autonom ous ▁lord ship ▁lying ▁between ▁the ▁Cast ile , ▁Arag on ▁and ▁Val encia . ▁ ▁J ere z ▁( 1 2 6 1 – 6 4 ) ▁In ▁the ▁spring ▁or ▁summer ▁of ▁ 1 2 6 1 , ▁Alfonso ▁X ▁conquer ed ▁J ere z . ▁He ▁appointed ▁Nu ño ▁as ▁the ▁first ▁Christian ▁al ca ide ▁( cast ellan ) ▁of ▁the ▁alc áz ar ▁( cit adel ) ▁of ▁J ere z ▁de ▁la ▁F ron tera . ▁Nu ño ▁appointed ▁the ▁kn ight ▁García ▁Gó mez ▁Car ril lo ▁as ▁his ▁commander ▁on ▁the ▁spot . ▁By ▁ 1 2 6 4 ▁the ▁Muslim ▁town spe ople ▁had ▁constructed ▁a ▁wall ▁between ▁the ▁town ▁and ▁the ▁cit adel . ▁That ▁year , ▁with ▁support ▁from ▁the ▁Mar in ids ▁of ▁Mor oc co , ▁they ▁re bel led ▁and ▁attacked ▁the ▁cit adel , ▁where ▁Nu ño ▁was ▁in ▁command ▁with ▁only ▁a ▁few ▁kn ights . ▁He ▁immediately ▁appe aled ▁to ▁the ▁king ▁at ▁Se ville ▁and ▁demanded ▁that ▁he ▁come ▁in ▁person ▁to ▁rel ieve ▁him . ▁When ▁no ▁help ▁was ▁forth coming , ▁Nu ño ▁abandoned ▁his ▁post , ▁leaving ▁only ▁a ▁small ▁g arrison ▁behind . ▁A ▁small ▁relief ▁force ▁from ▁Se ville ▁arrived ▁too ▁late . ▁The ▁cit adel ▁fell ▁and ▁the ▁g arrison ▁was ▁mass ac red ▁on ▁ 8 ▁August . ▁ ▁Nu