In 1616 Marie's rule was strengthened by the addition to her councils of Armand Jean du Plessis (later Cardinal Richelieu), who had come to prominence at the meetings of the Estates General. However, her son Louis XIII, already several years into his legal majority, asserted his authority the next year. The king overturned the pro-Habsburg, pro-Spanish foreign policy pursued by his mother, ordered the assassination of Concini, exiled the queen to the Château de Blois and appointed Richelieu to his bishopric.