The Countess of Valois refers to a title held by noblewomen in the historical region of Valois, located in northern France. This title was often associated with the royal family and was significant during the medieval period, particularly in the context of the House of Capet. The Countess played a role in the feudal system, managing lands and influencing local politics. One notable figure is Marguerite de Valois, who was the daughter of King Henry II of France and Catherine de' Medici. She was married to Henry of Navarre, later King Henry IV of France, which helped to unite the warring factions of the French Wars of Religion. Her life and marriage were pivotal in shaping the political landscape of France during that era.