Catherine was the younger daughter of Gaston of Foix, Prince of Viana, and Magdalena of Valois, the sister of Louis XI of France. She was born & raised during the reign of her paternal great-grandfather, King John II, who was succeeded by her grandmother Eleanor in 1479. Their father having already died, the crown of Navarre devolved upon Catherine's brother Francis Phoebus upon their grandmother's death the same year.
Reign
In 1483 the death of Francis made Catherine queen under the regency of their mother. Her uncle John of Foix, appealing to the Salic Law alien to the Kingdom of Navarre, claimed the throne and ignited a civil war that reignited the old conflict of the Beaumont-Agramont parties. In 1484, hard pressed by ambitions over the throne of Navarre, Magdalena of Valois decided to marry 15-year-old Catherine to John of Albret, hailing from a noble family in western Gascony. This marriage was favored by many of Catherine's Iberian subjects and would have given Catherine much needed support in her fight against her uncle's claim. The wedding took place at the Notre Dâme Cathedral of Lescar in 1486, but the coronation of the young couple in Pamplona was deferred until 1494, after a fleeting peace treaty with Louis of Beaumont, Count of Lerín, and Catherine's granduncle, King Ferdinand II of Aragon, was signed. However, the marriage did not garner the sympathy of the Navarrese Beaumont party, always preferring Isabella I of Castile's and Ferdinand II of Aragon's offer to marry Catherine to their son John, Prince of Asturias, and even the Agramont party split. Catherine's mother Magdalena died in 1495. In 1504, she made her will, confirming her son Henry's right to succeed her and expressing her wish to be buried at the Cathedral of Pamplona—ultimately both she and John were interred in Lescar. The political alliance between the houses of Valois and Foix ahead of an impending Spanish invasion led to marriage negotiations between Catherine and Louis XII in 1512. It was suggested that Henry should marry a daughter of the French king.
1512 Castilian-Aragonese invasion
Ferdinand, who had allied with the Pope against France, presented a set of claims to the legitimate royal family of Navarre. Catherine did not accept the demands, and Ferdinand sent Fernando Álvarez de Toledo, 3rd Duke of Alba, over to Pamplona, who occupied Pamplona on 25 July 1512. The Castilians went on to conquer St-Jean-Pied-de-Port after setting fire to Roncevaux, and wrought havoc across the merindad of Ultrapuertos. The Spanish troops would retain the southern half of that region intermittently for the next years. Catherine and John III, overwhelmed by the Castilian push, fled to Bearn, constituent part of their kingdom. They set their base in Pau, Orthez and Tarbes, where they alternately resided most of the time until their deaths. On 23 March 1513, the Cortes of Navarre reunited in Pamplona, greatly reduced to the pro-Spanish Beaumont party, and pledged allegiance to Ferdinand in exchange for his loyalty to the Navarrese laws. In 1515, Upper Navarre was annexed to the Crown of Castile as a different kingdom, and it would be one constituent part of the Kingdom of the Spains, as Spain came to be known during the following period.
Later years
In 1516, two columns led by King John III and Pedro, Marshal of Navarre, crossed the Pyrenees south and attempted to reconquer Navarre but they failed to progress into the heartland of the kingdom. Devastated by the defeats undergone, John retreated to Monein, and died on 17 June 1516. Queen Catherine did not outlive her husband much longer, and died in her domain of Mont-de-Marsan on 12 February 1517, just a few months later. By then, she had given birth to 13 children. From 1512 to her death in 1517, Catherine was actual queen only in some areas of Basse-Navarre, or Lower Navarre, north of the Pyrenees, but her domains extended to the contiguous Principality of Bearn and other lands.
