The Castello Estense or castello di San Michele is a moated medieval castle in the center of Ferrara, northern Italy. It consists of a large block with four corner towers.
Wikipedia https://en.wikipedia.org/wiki/Castello_Estense
Address 1 Piazzetta del Castello, Ferrara 44121, Italy
Coordinates 44°50'15.325" N 11°37'10.526" E