Laura Martinozzi, niece of the Chief minister of France Jules Cardinal Mazarin and one of the Mazarinettes, by marriage became Duchess consort of Modena and Reggio, and following the death of her husband, she acted as regent for her minor son during 1662–1674.

Jules Cardinal Mazarin, Duke of Mayenne, Rethel and Nevers, born Giulio Raimondo Mazzarino or Mazarini, was an Italian Catholic prelate, diplomat and politician who served as the chief minister to the Kings of France Louis XIII and Louis XIV from 1642 to his death. In 1654, he acquired the title Duke of Mayenne and in 1659 that of 1st Duke of Rethel and Nevers.