https://en.wikipedia.org/wiki/Treaty_of_the_Pyrenees
The Treaty of the Pyrenees (French: Traité des Pyrénées, Spanish: Tratado de los Pirineos, Catalan: Tractat dels Pirineus) was signed on 7 November 1659 on Pheasant Island, and ended the Franco-Spanish War that had begun in 1635.. Negotiations were conducted on Pheasant Island, situated in the middle of the Bidasoa River on the border between the two countries, …