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 intended 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 the king to have a deep aversion towards her.
As Queen of Navarre, she also played a pacifying role in the stormy relations between her husband and the French monarchy. Shuttled back and forth between the two courts, she endeavored to lead a happy conjugal life, but her sterility and the political tensions inherent in the French Wars of Religion caused the end of her marriage. Mistreated by a brother quick to take offence and 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 which lasted twenty years.
A well-known woman of letters and 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. While imprisoned, she took advantage of the time to write her Memoirs. She was 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.
She has been a victim of a misogynist historiographic tradition that has demolished the importance of her actions in the political sphere of the era, to reinforce the dynastic transition from the Valois to the Bourbon, giving credit to libel and slander circulated on her account and created and handed down through the centuries the myth of a beautiful woman, cultured, nymphomaniac and incestuous. This legend has crystallized around the famous nickname La Reine Margot (Queen Margot), invented by Alexandre Dumas, père.