Carlo Emanuele was born at the Royal Palace of Turin , the eldest son of Victor Amadeus , `` Duke of Savoy '' and Maria Antonia of Spain . Carlo Emanuele Ferdinando Maria di Savoia was born in Turin , the eldest son of King Victor Amadeus III of Savoy ( at the time styled `` Duke of Savoy '' ) and of his wife Infanta Maria Antonietta of Spain .