of the Renaissance at the Duchess's court. Isabella took care of the education of her remaining daughter Bona Maria, whose upbringing was led by Crisostomo Colonna and Antonio Galateo. She supported the development of education, music and literature in Bari. In 1506 she hosted her cousin Alfonso I d'Este, Duke of Ferrara, the third husband of Lucrezia Borgia. In 1513, she applied to the city council of Bari to raise salaries for public school teachers and to exempt them from taxes. Daughter's illness and son's death In 1510, Isabella's daughter, Bona Maria, fell seriously ill. The Duchess then asked the convent of Santa Maria della Nuova to pray for the health of the sick princess. After Bona Maria recovered, they both made a pilgrimage to the convent, where they offered thanksgiving gifts. In January 1512, the Duchess learned of the tragic death of her son Francesco Maria, who died after falling from a horse while hunting in Angoulême, France. In August of that year, Isabella's nephew and foster child, Rodrigo of Aragon, Duke of Bisceglie, died in Bari. After the death of her son, Isabella devoted herself entirely to raising her only surviving child, Bona Maria. Under her mother's direction, the princess received a humanist education, which included the teaching of statecraft. Initially, Isabella desired for Bona Maria to wed her cousin Ercole Massimiliano Sforza (who stayed in Innsbruck at the court of Holy Roman Emperor Maximilian I) in the hope of uniting their two rival branches of the family, and also with the purpose to give her daughter power in Milan. For this purpose, Isabella asked the city authorities of Bari in 1515 to enact a dowry for Bona Maria. On 5 January, it was decided to pay the Duchess 18,000 ducats; however, Ercole Massimiliano was reluctant to marry, so Isabella sent her confidant to Rome to seek help there. At the end, Ercole Massimiliano's control over the Duchy of Milan proved too weak at this point and the French took it over once again in the aftermath of the Battle of Marignano on 13 September 1515. In Rome, plans were also made to marry Bona Maria with Prince Philip of Savoy, younger brother of Duke Charles III. Ultimately, none of these marriage plans came to fruition. Daughter's marriage with King Sigismund I of Poland On 5 October 1515, Barbara Zápolya, wife of King Sigismund I the Old of