To escape from the violence of the times, she fled with her mother, Louise-Marie de Rieux, to the court of Brittany, which resided in Vannes and, later on, in Nantes. At the age of three she had been engaged to Pierre, the second son of Jean VI, Duke of Brittany, for political reasons. She married him at the age of fifteen, in 1442. In 1450, after the unexpected death of Pierre's elder brother, her husband came to rule Brittany as Pierre II. Françoise d'Amboise became the Duchess of Brittany and had a discrete but active share in governing Brittany. She came to help the poor and the sick. She had also a strong feeling about justice. Her husband died of a disease in 1457. She then entered into a conflict with King Louis XI who wanted to marry her. A widow without children, she founded, together with Jean Soreth, the first monastery of the Carmelites in France, in 1463. She took the veil in 1468, when entering the convent of the Three Maries at Vannes. She died in Nantes, at the monastery of the Carmelite nuns. In 1863, she was beatified by Pope Pius IX.
Eugène Lafolye, Compte des dépenses de Françoise d'Amboise, Editeur Vannes, 1889.
J.-L. Chalnel, Histoire de la Touraine, 1841, tome IV.