 But the Queens of Sardinia and later Italy used the title "Princess of Carignano" as part of their full title which included a lot of other titles.The fief of Carignano had belonged to the counts of Savoy since 1418; Carignano was erected by Charles Emmanuel I, Duke of Savoy into a principality as an appanage for his third son, Thomas Francis.The fact that it was part of Piedmont, only twenty km.