any ing ▁him ▁throughout ▁Europe . ▁On ▁his ▁return ▁to ▁Vall ad olid ▁in ▁ 1 5 5 2 , ▁he ▁joined ▁a ▁ ▁convent icle ▁considered ▁her et ical . ▁Among ▁this ▁group ▁of ▁religious ▁el ites ▁was ▁the ▁cor reg idor ▁of ▁Tor o , ▁Carlos ▁de ▁S eso ▁with ▁whom ▁he ▁had ▁been ▁in ▁contact ▁Juan ▁de ▁Val d és ▁in ▁Italy . ▁Despite ▁the ▁strict ▁rules ▁and ▁secre cy ▁pract iced ▁within ▁the ▁circle ▁they ▁were ▁discovered . ▁ ▁Tri al ▁and ▁Con v iction ▁ ▁C az alla ▁was ▁subject ed ▁to ▁a ▁carefully ▁managed ▁trial ▁by ▁the ▁In quis itor ▁General , ▁Fernando ▁de ▁Val d és , ▁who ▁communic ated ▁his ▁find ings ▁to ▁King ▁Philip ▁II . ▁Upon ▁a ▁conf ession ▁of ▁her es y , ▁the ▁penalty ▁was ▁burning ▁at ▁the ▁st ake ▁at ▁a ▁religious ▁cer emon ial ▁auto - da - f é ▁held ▁in ▁Vall ad olid ▁on ▁May ▁ 2 1 st , ▁ 1 5 5 9 . ▁Those ▁who ▁rec anted , ▁were ▁granted ▁the ▁mer cy ▁of ▁str ang ulation ▁before ▁burning . ▁His ▁sib lings ▁Francisco ▁de ▁Bu iero , ▁Beat riz ▁and ▁Pedro ▁were ▁also ▁pro sec uted ▁and ▁sent enced ▁to ▁the ▁st ake . ▁Two ▁more , ▁Cost anza ▁de ▁Bu iero ▁and ▁Juan ▁Bu iero , ▁were ▁condem ned ▁to ▁wear ▁the ▁San ben ito ▁and ▁perpet ual ▁imprison ment ▁( in ▁all , ▁they ▁were ▁ten ▁brothers ). ▁The ▁cor pse