icip ants ▁ ▁Pope ▁Nicholas ▁II ▁had ▁reserved ▁the ▁right ▁to ▁elect ▁the ▁po pe ▁to ▁the ▁cardinal ▁b ish ops , ▁pri ests , ▁and ▁de a cons ▁of ▁Rome ▁in ▁ 1 0 5 9 . ▁In ▁ 1 5 8 6 , ▁Pope ▁Si xt us ▁V ▁mand ated ▁that ▁the ▁maximum ▁number ▁of ▁card inals ▁would ▁be ▁sevent y . ▁Of ▁this ▁sevent y , ▁the ▁College ▁of ▁Card inals ▁had ▁si xty - n ine ▁members ▁at ▁the ▁time ▁of ▁Clement ▁VII ' s ▁death ▁but ▁only ▁si xty ▁of ▁these ▁were ▁present ▁for ▁the ▁opening ▁of ▁the ▁first ▁conc lave ▁of ▁ 1 6 0 5 , ▁and ▁si xty - one ▁elect ors ▁were ▁present ▁for ▁the ▁election ▁of ▁Leo ▁XI . ▁ ▁When ▁it ▁was ▁conven ed , ▁the ▁college ▁contained ▁members ▁who ▁had ▁been ▁created ▁by ▁six ▁different ▁pop es : ▁P ius ▁IV , ▁Si xt us ▁V , ▁Gregory ▁XIII , ▁Gregory ▁XIV , ▁In noc ent ▁IX , ▁and ▁Clement ▁VIII . ▁Of ▁these , ▁Clement ' s ▁cre ations ▁were ▁the ▁most ▁numerous , ▁number ing ▁thirty - e ight ▁of ▁the ▁cardinal - elect ors . ▁In noc ent ▁IX ▁had ▁created ▁one ▁of ▁the ▁conc lave ' s ▁elect ors ; ▁Gregory ▁XIV ▁had ▁created ▁five , ▁Si xt us ▁V ▁had ▁created ▁eleven , ▁Gregory ▁XIII ▁had ▁created ▁four , ▁and ▁P ius ▁IV ▁had ▁created ▁one . ▁ ▁Pietro ▁Ald ob rand ini , ▁the ▁cardinal