What was the Peace of Rueil and how did it end the first phase of the Fronde?

The Peace of Rueil was a treaty ratified on April 1, 1649, that concluded the first phase of the Fronde, known as the Fronde of the Parlement.

This phase of the civil war began in January 1649 after the Parlement of Paris refused to approve royal revenue measures and sought to impose constitutional limits on the monarchy. The government, led by Jules, Cardinal Mazarin, attempted to suppress the rebellion by blockading Paris, but the city remained defiant with the support of Parisian leaders and elements of the high nobility.

Faced with the dual pressure of domestic unrest and an ongoing foreign war against Spain, the government negotiated the Peace of Rueil. The agreement effectively ended the conflict by granting amnesty to the rebels and confirming the concessions previously demanded by the Parlement, such as tax reforms and the limitation of royal authority regarding judicial and financial decrees.1