A treaty signed between the Bishop of Urgell and The Count of Foix in the 13th century gave birth to the Co-Principality. In the 16th century, the Count's rights were transfered to the French Crown. ###>L'institution de la coprincipauté trouve ses origines dans les Paréages signés au XIIIème siècle, entre l'évêque d'Urgell et le comte de Foix.