Simplify the following text for a Grade 8 native English-speaking person.
Original: Marie Jeanne of Savoy ( Marie Jeanne Baptiste ; 11 April 1644 -- 15 March 1724 ) was Duchess of Savoy as wife of Charles Emmanuel II , Duke of Savoy .
Simplified: Marie Jeanne of Savoy ( Marie Jeanne Baptiste ; 11 April 1644 -- 15 March 1724 ) was born a Princess of Savoy and was later the Duchess of Savoy .