 Ferdinando was born in the Palazzo Pitti to Cosimo III de' Medici and his wife Marguerite Louise d'Orléans, a granddaughter of Maria de' Medici.When Ferdinando's parents separated in 1675, his mother (who disdained her husband only slightly more than Florence did) returned to Paris, where she was supposed to be confined to a monastery in Montmartre.Ferdinando became a rebellious youth, who disagreed intensely with his father on every subject.