8 4 0 ▁retired ▁from ▁public ▁life ▁and ▁lived ▁in ▁religious ▁se clusion ▁in ▁P ian ore . ▁He ▁visited ▁her , ▁but ▁commented ▁that ▁her ▁weak ▁intellect ▁and ▁lack ▁of ▁sens itivity ▁" w ould ▁enable ▁her ▁to ▁live ▁a ▁century ". ▁Charles ▁Louis ▁adm ired ▁female ▁beauty , ▁but ▁was ▁believed ▁to ▁be ▁hom osex ual . ▁ ▁While ▁in ▁his ▁Duch y , ▁Charles ▁was ▁really ▁little ▁in ▁his ▁capital ▁prefer ring ▁to ▁stay ▁in ▁the ▁country ▁in ▁Mar lia . ▁In ▁ 1 8 4 5 ▁his ▁son ▁married ▁prin cess ▁Louise ▁Marie ▁Th ér èse ▁d ' Ar to is , ▁a ▁daughter ▁of ▁the ▁Duke ▁of ▁Ber ry ▁and ▁the ▁only ▁sister ▁of ▁the ▁French ▁legit imate ▁pret ender , ▁the ▁Count ▁of ▁Ch amb ord . ▁ ▁Under ▁pressure ▁by ▁Austria , ▁Charles ▁Louis ▁agreed ▁on ▁some ▁territorial ▁adjust ments ▁that ▁were ▁det r iment al ▁to ▁his ▁future ▁inheritance ▁in ▁Par ma . ▁By ▁the ▁treat y ▁of ▁Florence , ▁on ▁ 2 8 ▁Nov ▁ 1 8 4 4 , ▁between ▁Charles ▁Louis ▁and ▁the ▁du kes ▁of ▁T usc any ▁and ▁Mod ena , ▁he ▁had ▁to ▁give ▁up ▁his ▁claim ▁to ▁the ▁Duch y ▁of ▁Gu ast alla ▁and ▁the ▁lands ▁east ▁of ▁the ▁En za . ▁These ▁territ ories ▁would ▁be ▁given ▁to ▁Mod ena ▁receiving ▁in ▁compens ation ▁only ▁L un ig iana . ▁The ▁treat y ▁of ▁Florence ▁remained ▁a ▁secret ▁for ▁nearly ▁three ▁years , ▁but ▁once ▁it