The Princess Palatine Elizabeth Charlotte was a German princess and the wife of Monsieur, Philippe I, Duke of Orléans, younger brother of Louis XIV of France. Mother of France's ruler during the Regency.
Françoise Athénaïs Montespan was the mistress of Louis XIV. She was maid of honor to Queen Marie Thérèse, his Queen. She bore the king several children. Their education was entrusted to Mme. de Maintenon, who succeeded her in the king’s favor.
Contrary to caption, this is not "Maria Theresa of Spain, Louis XIV's wife" but Queen Marie Leczinska of France, consort of Louis XV. By Louis Tocque, at the Louvre. (Clothing would be wrong for Maria Theresa.