▁ 1 8 5 3 . ▁ ▁His ▁only ▁son ▁Charles ▁III , ▁age ▁ 3 1 , ▁was ▁assass in ated ▁on ▁ 2 7 ▁March ▁ 1 8 5 4 . ▁In ▁ 1 8 5 4 ▁Charles ▁Louis ▁moved ▁to ▁Paris . ▁In ▁ 1 8 5 6 ▁he ▁visited ▁his ▁son ' s ▁tomb ▁in ▁Via re gg io ▁and ▁saw ▁his ▁wife . ▁His ▁grand son , ▁Robert ▁I , ▁who ▁was ▁reign ing ▁in ▁Par ma ▁under ▁the ▁reg ency ▁of ▁his ▁mother , ▁Louise ▁Marie ▁Th ér èse , ▁lost ▁his ▁throne ▁in ▁March ▁ 1 8 6 0 ▁during ▁the ▁Italian ▁un ification . ▁Charles ▁Louis , ▁unlike ▁other ▁d eth ron ed ▁Italian ▁monarch s , ▁wel com ed ▁the ▁un ification ▁of ▁Italy ▁as ▁a ▁positive ▁development . ▁ ▁After ▁ 1 8 6 0 ▁Charles ▁Louis ▁was ▁able ▁to ▁come ▁to ▁Italy ▁more ▁freely . ▁He ▁visited ▁Lu cca ▁with ▁increasing ▁frequency ▁stay ing ▁in ▁the ▁Vill as ▁of ▁Mont ign oso ▁and ▁San ▁Mart ino ▁in ▁V ign ale . ▁His ▁wife , ▁Maria ▁Ther esa , ▁who ▁lived ▁in ▁complete ▁ret irement ▁as ▁a ▁nun ▁in ▁villa ▁San ▁Mart ino ▁in ▁Lu cca ▁died ▁on ▁ 1 6 ▁July ▁ 1 8 7 9 . ▁Charles ▁Louis ▁was ▁in ▁Vienna ▁at ▁the ▁time ▁and ▁only ▁in ▁October ▁came ▁to ▁pay ▁respect ▁to ▁her ▁remains . ▁His ▁great ▁grand d augh ter ▁Arch du ch ess ▁Louise ▁of ▁T usc any