Marie Jeanne Baptiste of Savoy-Nemours (11 April 1644 – 15 March 1724) was born a Princess of Savoy and became the Duchess of Savoy by marriage. First married by proxy to Charles of Lorraine in 1662, Lorraine soon refused to recognise the union and it was annulled. She married Charles Emmanuel II, Duke of Savoy in 1665 who was her kinsman. The mother of the future Victor Amadeus II of Sardinia who saw the elevation of the House of Savoy to kings, she styled herself as Madama Reale or Madame Royale. She acted as Regent of Savoy from 1675 in the name of her son Victor Amadeus II, who was her husband's successor. Her regency officially ended in 1680, but she maintained power until her son banished her from further influence in the state in 1684. She left a considerable architectural legacy in Turin, and was responsible for the remodelling of the Palazzo Madama, which was her private residence. At the time of her death she was the mother of the King of Sardinia as well as great grandmother of two other kings, Louis I of Spain and Louis XV of France.