Treaty of the Pyrenees

The Treaty of the Pyrenees, signed in 1659, was a peace agreement between France and Spain that marked the end of the Franco-Spanish War. It established the Pyrenees mountain range as the border between the two countries and led to territorial exchanges, with France gaining parts of modern-day Catalonia and Roussillon. Additionally, the treaty included arrangements for royal marriages, aiming to solidify peace and strengthen alliances. This treaty significantly shifted the balance of power in Europe, enhancing France's influence while marking the decline of Spanish dominance.