[citation needed] Ippolito was born in Ferrara, Italy, the second son of Duke Alfonso I d'Este and Lucrezia Borgia.In addition to Milan, at the end of his life Ippolito also held the benefices of the sees/abbeys of Bondeno, Chaalis (1540–1572), Jumieges in Normandy, Lyon, Narbonne, and Saint-Médard in Soissons.Ippolito d'Este was created Cardinal of Santa Maria in Aquiro by Pope Paul III in the consistory on 20 December 1538.[2] At the time of his elevation to Cardinal he was the Ferrarese ambassador to the French court, whose interests he was to see to personally as Cardinal-Protector of France from 1549, in the reign of Henry II.These materials form the basis for Mary Hollingsworth's book, The Cardinal's Hat: Money, Ambition, and Everyday Life in the Court of a Borgia Prince, a social history of Ippolito d'Este and his times.