The Castello Estense is a castle of the family d'Este in Ferrara. In the 14th and 15th centuries, when Ferrara flourished under the Este, the Castello served as a residence …
It was built by Niccolò III, under the direction of Giovanni da Siena, between 1424 and 1434, in the same period the "Delizia" of Belriguardo was built.
The castle of Arquà Polesine, commonly called Castello Estense, was built in 1146. The castle has medieval architecture and of particular interest is the 26.10 meter high tower.