sw ick - W olf en b ütt el ▁to ▁Charles . ▁The ▁union ▁was ▁celebrated ▁on ▁ 1 ▁August ▁ 1 7 0 8 . ▁ ▁The ▁appointment ▁was ▁highly ▁successful , ▁with ▁T ön nem ann ▁winning ▁the ▁trust ▁of ▁the ▁young ▁Arch du ke . ▁After ▁Joseph ▁I ▁died ▁in ▁ 1 7 1 1 , ▁Charles ▁became ▁the ▁r uler ▁of ▁the ▁Empire . ▁T ön nem ann ▁returned ▁with ▁him ▁to ▁Vienna , ▁remaining ▁his ▁advis er ▁and ▁conf essor ▁until ▁his ▁death ▁in ▁March ▁ 1 7 4 0 . ▁Charles ▁died ▁six ▁months ▁later , ▁holding ▁the ▁cru c if ix ▁given ▁to ▁him ▁by ▁T ön nem ann . ▁ ▁Since ▁politics ▁and ▁religion ▁were ▁linked ▁in ▁the ▁H abs burg ▁Empire , ▁T ön nem ann ' s ▁duties ▁were ▁various . ▁He ▁was ▁Chap lain - in - Ch ief ▁of ▁the ▁Imperial ▁Army . ▁He ▁was ▁also ▁a ▁political ▁advis er ▁to ▁Charles , ▁with ▁considerable ▁influence , ▁which ▁is ▁clear ▁from ▁the ▁correspond ence ▁of ▁the ▁two ▁men . ▁The ▁Roman ▁Catholic ▁Church ▁and ▁H abs burg ▁Empire ▁still ▁needed ▁each ▁other ▁- ▁this ▁al liance ▁preserved ▁the ▁H abs burg s ▁and ▁defeated ▁Protest ant ism ▁in ▁Central ▁Europe . ▁▁ ▁Charles ▁VI ▁is ▁remembered ▁for ▁his ▁Prag m atic ▁San ction ▁- ▁prom ul g ated ▁in ▁ 1 7 2 4 ▁- ▁in ▁which ▁he ▁stated ▁that ▁his ▁daughter ▁- ▁Maria ▁Th eres ia ▁- ▁was ▁to ▁succeed