Este, Ippolito D
Este, Ippolito d'
an Italian prelate, son of duke Ercole I, was born in 1479. He was appointed cardinal at the age of fifteen years by pope Alexander VI. He is accused of having given orders for putting out the eyes of his natural brother, Giulio d'Este, through jealousy. He was the political counsellor and lieutenant of his brother Alfonso, who had become duke of Ferrara in 1505. He contributed to the destruction of the Venetian fleet, December 22, 1509. Cardinal d'Este had received a very careful education, and possessed extensive knowledge, particularly of mathematics. He died in 1520. See Hoefer, Nouv. Biog. Generale, s.v.