Giulio d'Este

Giulio d'Este (July 13, 1478 – March 24, 1561) was the illegitimate son of Ercole I d'Este, Duke of Ferrara, the result of an affair with Isabella Arduin, a lady in the service of Ercole's wife. He is known for the conflicts he had with his half brother Ippolito d'Este, which culminated in a failed conspiracy that Giulio conducted against both Ippolito and another half brother Alfonso I d'Este, then Duke of Ferrara.

The half siblings of Giulio, who Ercole fathered with his wife Eleonora d'Aragon, were Alfonso I d'Este (successor to his father), Ippolito d'Este (Cardinal Ippolito), Ferrante d'Este, Isabella d'Este (wife of Francesco II Gonzaga), Beatrice d'Este (wife of Ludovico Sforza), and Sigismondo d'Este. Giulio d'Este and Ippolito d'Este, held grudges and differences with each other over the course of their lives.

Giulio grew up in the court of Ferrara and later resided in his palace on the Via degli Angeli (road of angels) in Ferrara.

Between Giulio and Ippolito a dispute arose concerning a musician, Don Rainaldo of Sassuolo, who was in the service of Giulio. Ippolito wanted him for his chapel and, near the end of 1504, coming to Ferrara during the illness of his father Ercole I, abducted Rainaldo and held him in the Fortress of Gesso (which belonged to Giovanni Boiardo, count of Scadiano). In May 1505 Giulio discovered where the man was to be found and together with Ferrante and other armed men recovered his musician, and, in a sign of defiance towards the cardinal, replaced him with the warden of the fortress. Ippolito, a political advisor of Alfonso, complained so much about what had happened that the duke decided to exile Ferrante to Modena and Giulio to Brescello.

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