Alexandre Dumas 
Marguerite de Valois 

Margaret of Valois (French: Marguerite, 14 May 1553 – 27 March 1615) was a French princess of the Valois dynasty who became queen consort of Navarre and later also of France. By her marriage to Henry III of Navarre (later Henry IV of France), she was queen of Navarre and then France at her husband’s 1589 accession to the latter throne. Their marriage was annulled in 1599 by decision of the Pope. She was the daughter of King Henry II of France and Catherine de’ Medici and the sister of kings Francis II, Charles IX and Henry III. Her marriage, which was to celebrate the reconciliation of Catholics and Huguenots, was tarnished by the St Bartholomew’s Day massacre, and the resumption of the religious troubles which ensued. In the conflict between Henry III and the Malcontents, she took the side of Francis, Duke of Anjou, her younger brother, and this caused a deep aversion of the king against her. (Excerpt from Wikipedia)