▁them ▁were ▁outside ▁the ▁Cur ia ▁on ▁diplom atic ▁assign ments . ▁ ▁Card inal ▁Com es ▁Cas ate , ▁Card inal ▁Pri est ▁of ▁SS . ▁Mar cell ino ▁e ▁Pietro ▁was ▁dead ▁on ▁or ▁by ▁ 8 ▁April ▁ 1 2 8 7 . ▁ ▁The ▁Con cla ve ▁began ▁in ▁mid - A pril ▁at ▁the ▁pap al ▁palace ▁next ▁to ▁Santa ▁Sab ina ▁on ▁the ▁A vent ine ▁Hill ▁in ▁Rome . ▁ ▁During ▁the ▁S ede ▁V ac ante ▁in ▁ 1 2 8 7 ▁there ▁also ▁died ▁Card inal ▁Geoff rey ▁of ▁Al atri , ▁Gi ord ano ▁Or s ini , ▁and ▁ ▁Geoff rey ▁de ▁Bar , ▁Card inal ▁Pri est ▁of ▁Santa ▁Sus anna . ▁Card inal ▁Hugh ▁of ▁E ves ham ▁died ▁on ▁ 2 8 ▁July ▁ 1 2 8 7 . ▁ ▁Card inal ▁Ger va is ▁de ▁C lin ch amp ▁died ▁on ▁ 2 4 ▁September ▁ 1 2 8 7 , ▁during ▁an ▁inter mission ▁in ▁the ▁Con cla ve ▁of ▁ 1 2 8 7 - 1 2 8 8 , ▁in ▁which ▁the ▁card inals ▁had ▁scattered ▁due ▁to ▁a ▁fear ▁of ▁' the ▁pl ague '. ▁He ▁was ▁buried ▁in ▁his ▁tit ular ▁church ▁of ▁S . ▁Mart ino ▁ai ▁Mont i . ▁Only ▁one ▁cardinal ▁remained ▁at ▁the ▁pap al ▁palace ▁next ▁to ▁Santa ▁Sab ina ▁on ▁the ▁A vent ine , ▁where ▁the ▁Con cla ve ▁had ▁begun . ▁ ▁In ▁February ▁