Margaret of Valois (, 14 May 1553 – 27 March 1615), popularly known as , was a French princess of the Valois dynasty who became Queen of Navarre by marriage to Henry III of Navarre and then also Queen of France at her husband's 1589 accession to the latter throne as Henry IV. Margaret 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 union with the King of Navarre, which had been intended to contribute to the reconciliation of Roman Catholics and the Huguenots in France, was tarnished six days after the marriage ceremony by the St Bartholomew's Day massacre and the resumption of the French Wars of Religion. In the conflict between Henry III of France and the Malcontents, she took the side of Francis, Duke of Anjou, her younger brother, which caused Henry to have a deep aversion towards her. As Queen of Navarre, Margaret also played a pacifying role in the stormy relations between her husband and the French monarchy. Shuttling back and forth between the two courts, she endeavoured to lead a happy conjugal life, but her infertility and the political tensions inherent in the civil conflict led to the end of her marriage. Mistreated by a brother, who was quick to take offence, and being rejected by a fickle and opportunistic husband, she chose the path of opposition in 1585. She took the side of the Catholic League and was forced to live in Auvergne in an exile that lasted 20 years. In 1599, she consented to a "royal divorce", the annulment of the marriage, but only after the payment of a generous compensation. A well-known woman of letters, an enlightened mind as well as an extremely generous patron, she played a considerable part in the cultural life of the court, especially after her return from exile in 1605. She was a vector of Neoplatonism, which preached the supremacy of platonic love over physical love. During her imprisonment, she took advantage of the time to write her Memoirs, the first woman to have done so. She was one of the most fashionable women of her time and influenced many of Europe's royal courts with her clothing. After her death, the anecdotes and slanders circulated about her created a legend, which was consolidated around the nickname La Reine Margot,