 In the last years of Visconti domination it sustained a siege by Francesco Sforza.Once he was settled in power in Lombardy, Sforza arranged for Vigevano to be set up as the seat of a bishop and provided its revenues.Vigevano is crowned by the Castello Sforzesco, a stronghold rebuilt 1492–94 for Ludovico Maria Sforza (Ludovico il Moro), the great patron born in the town, who transformed the fortification/hunting lodge of Luchino Visconti (who in turn had re-used a Lombard fortress) into a rich noble residence, at the cusp of Gothic and Renaissance.