▁Marco ' s ▁influence ▁over ▁Leopold ▁was ▁exerc ised ▁respons ibly , ▁in ▁the ▁sole ▁interests ▁of ▁Christian ity ▁and ▁of ▁the ▁House ▁of ▁Austria . ▁In ▁one ▁of ▁his ▁private ▁letters ▁to ▁the ▁Emperor , ▁Marco ▁actually ▁sc olds ▁him ▁quite ▁force fully ▁for ▁grant ing ▁a ▁benefit ▁to ▁one ▁of ▁his ▁brothers , ▁rem inding ▁him ▁that , ▁by ▁so ▁doing , ▁he ▁was ▁only ▁providing ▁am mun ition ▁for ▁the ▁enemies ▁of ▁their ▁cause . ▁ ▁Marco ▁d ' ▁Av iano ▁died ▁of ▁cancer ▁on ▁August ▁ 1 3 , ▁ 1 6 9 9 ▁in ▁Vienna . ▁He ▁is ▁buried ▁in ▁the ▁Kap uz iner kirche , ▁in ▁whose ▁v ault ▁ ▁the ▁H abs burg ▁em per ors ▁are ▁buried . ▁ ▁Honor ary ▁protection ▁Notable ▁people ▁who ▁are ▁bapt ised ▁under ▁protection ▁of ▁Marcus ▁are : ▁ ▁Arch du ke ▁ ▁Anton ▁Karl ▁Ludwig ▁Georg ▁Felix ▁Marcus ▁d ' Av iano ▁of ▁H abs burg ▁L oth r ingen . ▁ ▁Arch du ch ess ▁Adel heid ▁Maria ▁Jose fa ▁Si xt a ▁Anton ia ▁Ro berta ▁Ott onia ▁Z ita ▁Charlotte ▁Lu ise ▁Im mac ul ata ▁Pia ▁Th eres ia ▁Beat rix ▁Francis ka ▁Isabel le ▁Henri ette ▁Maxim il iana ▁Gen ove va ▁Ign atia ▁Marcus ▁d ' Av iano ▁of ▁Austria . ▁ ▁Arch du ke ▁ ▁Felix ▁Friedrich ▁August ▁Maria ▁vom ▁Sie ge ▁Franz ▁Joseph ▁Peter ▁Karl ▁Anton ▁Robert ▁Otto ▁P ius ▁Michael ▁Bened ikt ▁Sebastian ▁Ign ati us ▁Marcus ▁d '