Signed in 1659, the Treaty of the Pyrenees marked the end of prolonged hostilities between France and Spain. While not heavily publicized, its significance profoundly affected Franco-Spanish relations through territorial exchanges and diplomatic resolutions, ultimately leading to the marriage between King Louis XIV of France and Maria Theresa of Spain. This connection helped establish alliances that influenced European diplomacy, showcasing the treaty's role in reducing regional tensions and fostering diplomatic dialogue.