▁in ▁the ▁ 1 4 3 5 ▁b ull ▁Sic ut ▁D ud um , ▁which ▁prohib ited ▁capt uring ▁slaves ▁in ▁the ▁Can ary ▁Islands . ▁ ▁Cal li xt us ▁III ▁ordered ▁a ▁new ▁trial ▁for ▁Joan ▁of ▁Arc ▁( c . ▁ 1 4 1 2 – 1 4 3 1 ), ▁at ▁which ▁she ▁was ▁post hum ously ▁v ind ic ated . ▁Cal li xt us ▁III ▁canon ized ▁the ▁following ▁four ▁sain ts ▁during ▁his ▁pont ificate : ▁Vincent ▁Fer rer ▁( 3 ▁June ▁ 1 4 5 5 ), ▁O sm und ▁( 1 ▁January ▁ 1 4 5 7 ), ▁Albert ▁of ▁T rap ani ▁( 1 5 ▁October ▁ 1 4 5 7 ), ▁and ▁Rose ▁of ▁V iter bo ▁( 1 4 5 7 ). ▁ ▁Cal li xt us ▁III ▁elev ated ▁nine ▁new ▁card inals ▁into ▁the ▁cardinal ate ▁in ▁two ▁cons istor ies ▁on ▁ 2 0 ▁February ▁ 1 4 5 6 ▁and ▁ 1 7 ▁December ▁ 1 4 5 6 , ▁two ▁of ▁whom ▁were ▁cardinal ▁nep he ws . ▁The ▁first ▁of ▁them ▁was ▁Rod r igo ▁de ▁Borg ia ▁who ▁later ▁became ▁Pope ▁Alexander ▁VI ▁( 1 4 9 2 – 1 5 0 3 ), ▁inf am ous ▁for ▁his ▁cor ruption ▁and ▁imm or ality . ▁The ▁second ▁was ▁Luis ▁Julian ▁de ▁Mil à . ▁ ▁The ▁po pe ▁approved ▁of ▁the ▁establishment ▁of ▁the ▁University ▁of ▁Gre if sw ald ▁that ▁took