sentences:  To accommodate the growth of Ferrara, in 1492 the Duke Ercole I d'Este demolished the medieval walls of the city on the north, and had the court architect, Biagio Rossetti, design an urban expansion known as the "Addizione Erculea".Rosetti was commissioned by Sigismondo d'Este, brother of the Duke Ercole I, to build this palace at the prestigious intersection of what was to be the Decumanus Maximus (now encompassing Corsi Porta Po, Biagio Rossetti, and Porta Mare) and Cardo Maximus (Corso Ercole I d'Este) of the "urban addition".It was built between 1493 and 1503.