The Peace of Rueil (French: Paix de Rueil, IPA: [pɛ də ʁɥœj] or [ʁɥɛj]), signed 11 March 1649, signalled an end to the opening episodes of the Fronde, France's civil war, after little blood had been shed. The articles ended all hostilities and declared all avenues of trade reopened. The settlement was promulgated in the name of the child king Louis XIV through his mother Anne of Austria, the Queen Regent. Cardinal Mazarin, the true power of the court party, was not mentioned in the text, though he was a signatory, as was the Grand Condé, who had been recruited by the court party to overcome the resistance of Paris.
The Parlement of Paris was directed to report to Saint Germain-en-Laye, where the king proposed to hold a lit de justice solely to proclaim the agreed-upon articles, after which the Parlement was to return to Paris and carry on as usual, though it was agreed that no further sessions of the Chambre Saint-Louis would be held during the year. The Declarations of the Parlement of July and October 1648— which a historian might consider the opening paper volley of the Fronde— were confirmed, but all the recent general edicts of the Parlement, enacted since 6 January, were declared null and void. The King, "desiring to give evidence of his affection to the inhabitants of his good City of Paris," declared that he was resolved to return to the capital.
The lettres de cachets issued in the king's name were likewise nullified. The war of words was thereby retracted on both sides. Troops raised by the Parlement were to be disbanded and the King's to be returned to their customary garrisons. The Bastille and the Paris Arsenal, which had been seized by the forces of the Parlement, were to be returned to royal control. As for the envoy from the archduke Leopold, Philip IV’s representative in the Spanish Netherlands, who was offering Habsburg aid, poised to invade the north of France as a result of negotiations on the part of the prince de Conti, he was to be sent away from Paris without a response from the Parlement.