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| Castle Estense | |
|---|---|
Castello Estense (in Italian) | |
 Exterior view and moat | |
  Location within Italy | |
| General information | |
| Architectural style | Renaissance |
| Town or city | Ferrara |
| Country | Emilia-Romagna, Italy |
| Coordinates | 44°50′15″N 11°37′10″E / 44.83750°N 11.61944°E |
| Construction started | 29 September 1385 |
| Client | Niccolò II of Este |
| Owner | Province of Ferrara |
| Design and construction | |
| Architect(s) | Bartolino da Novara, Girolamo da Carpi |
The Castello Estense ('Este castle') or castello di San Michele ('St. Michael's castle') is a moated medieval castle in the center of Ferrara, northern Italy. It consists of a large block with four corner towers.