He was the nephew of Louis XI of France and the grand-nephew of Cardinal Pierre de Foix, le vieux.

[1] After graduation, he traveled to Rome, where he delivered an oration before Pope Paul II and the College of Cardinals.

[1] Pope Sixtus IV confirmed his appointment on March 11, 1476 and Foix subsequently occupied this see until his death.

[1] Pope Sixtus IV made him a cardinal deacon in the consistory of December 18, 1476.

[1] Around 1485, he brokered a peace deal between Charles VIII of France and Francis II, Duke of Brittany.