 francis hyacinth (; 14 september 1632 â 4 october 1638) was the duke of savoy from 1637 to 1638 under regency of his mother marie christine. ==biography== born at the castle of valentino in turin he was the eldest surviving son of victor amadeus i, duke of savoy and his wife christine marie of france. as the heir to the savoyard throne, he was styled as the prince of piedmont. his parents had had another son but had died in 1628 prior to the birth of francis hyacinth. at his father's death in october 1637, he succeeded and his mother took power having been claimed regent. while duke of savoy he also held the subsidiary titles of marquess of saluzzo, count of aosta, moriana and nice, and claimant king of jerusalem. the infant was nicknamed the flower of paradise (french: fleur de paradis). having succeeded his father at such a young age, francis hyacinth did not rule de facto being only 5 years old. having caught a fever, he died at the castle of valentino, and was succeeded by his brother charles emmanuel ii. the infant was buried at the sacra di san michele in turin. ==titles, styles, honours and arms== ===titles and styles=== *14 september 1632 &ndash; 7 october 1637 his highness the prince of piedmont *7 october 1637 &ndash; 4 october 1638 his highness the duke of savoy ==ancestry==  {{ahnentafel-compact5 |style=font-size: 90%; line-height: 110%; |border=1 |boxstyle=padding-top: 0; padding-bottom: 0; |boxstyle_1=background-color: #fcc; |boxstyle_2=background-color: #fb9; |boxstyle_3=background-color: #ffc; |boxstyle_4=background-color: #bfc; |boxstyle_5=background-color: #9fe; |1= 1. francis hyacinth, duke of savoy |2= 2. victor amadeus i, duke of savoy |3= 3. princess christine marie of france |4= 4. charles emmanuel i, duke of savoy |5= 5. infanta catherine michelle of spain |6= 6. henry iv of france |7= 7. marie de' medici |8= 8. [[emmanu
1632_births 1638_deaths Burials_at_the_Sacra_di_San_Michele,_Turin Claimant_Kings_of_Jerusalem Counts_of_Aosta Dukes_of_Savoy Grand_Masters_of_the_Order_of_Saints_Maurice_and_Lazarus Grand_Masters_of_the_Order_of_the_Most_Holy_Annunciation Modern_child_rulers People_from_Turin Princes_of_Piedmont Princes_of_Savoy Rulers_who_died_as_children