Louis XIII ascended the throne in 1610 upon the assassination of his father, and his mother Marie de' Medici acted as his Regent. Although Louis XIII became of age at thirteen (1614), his mother did not give up her position as Regent until 1617, when he was 16. Marie maintained most of her husband's ministers, with the exception of Maximilien de Béthune, Duke of Sully, who was unpopular in the country. She mainly relied on Nicolas de Neufville, seigneur de Villeroy, Noël Brûlart de Sillery, and Pierre Jeannin for political advice. Marie pursued a moderate policy, confirming the Edict of Nantes. She was not, however, able to prevent rebellion by nobles such as Henri, Prince of Condé (1588–1646), second in line to the throne after Marie's second surviving son Gaston, Duke of Orléans. Condé squabbled with Marie in 1614, and briefly raised an army, but he found little support in the country, and Marie was able to raise her own army. Nevertheless, Marie agreed to call an Estates General assembly to address Condé's grievances.