Catherine was educated by the nuns of the “Murate” (walled up), in their convent near the Porta Santa Croce. The teaching of these lonely enthusiasts strangely contrasted with the life she afterwards led in the Florentine Court--a very hot-bed of vice, intrigue, and ambition. There did this Medea of the Cinque-cento learn how to dissimulate and to betray. At fifteen she became, by the favour of her uncle, Pope Clement VII., the richest heiress in Europe. She was tall and finely formed, of a clear olive complexion (inherited from her French mother), with well-cut features, and large, prominent eyes, like all the Medici. Her manners were gracious, her countenance expressive, but there was, even in extreme youth, a fixed and cold expression on the statuesque face that belied these pleasant attributes. Many suitors sought her hand, but Clement VII., outraged at the brutality of the Spanish coalition against him under Charles V., which had resulted in the sack of Rome and his own imprisonment in the Castle of St. Angelo, was glad to spite his enemies by bestowing his wealthy niece on the Duc d’Orléans, son of Francis I. As the heiress of the Medici came of a republican race of merchant princes, mere mushrooms beside the lofty antiquity of the Valois line, the Pope, to give greater lustre to the espousals, announced that he would himself conduct his niece to her future husband. At Leghorn, Catherine embarked with her uncle in a sumptuous papal galley, attended by his tonsured Court. A flotilla of boats accompanied the vice-regent of God upon earth, and his niece, the sparkling _Duchessina_. Fair winds and smooth seas soon wafted them to the French shore, where Francis and his sons awaited their arrival at Marseilles. Francis, says Brantôme, was so charmed with the Medici bride, her intelligence and lively manners, that he romped with her the entire evening after her arrival. When Francis found that she danced admirably, that she shot with an arquebuse like a trooper, played at _maille_ like a boy, and rode boldly and gracefully, his partiality to his new daughter-in-law knew no bounds. What was the opinion of the [Illustration: CHÂTEAU DE CHAMBORD.] bridegroom Orléans, and what comparison he made between a bride of fifteen and a mistress of thirty-five, is not recorded. There was nearly twenty years difference in age between Prince Henry, Duc d’Orléans, a mere boy, and Diane de Poitiers, yet her influence over him was still absolute. To the day of his death he wore her colours--white and black--upon his shield. Diane, secure in power, was rather proud of her age. She boasted to the new Duchess that she was never ill, that she rose at six o’clock in the morning, bathed in the coldest water, and rode two hours before breakfast.