The Castello Estense, also known as the castello di San Michele, is indeed a significant historical landmark located in the heart of Ferrara, Italy. This moated medieval castle began its construction on September 29, 1385, as a fortress for the Este family following a violent public uprising. Over the centuries, it has undergone various transformations, notably under the direction of architect Girolamo da Carpi after a fire in 1544, which gave the castle its current Renaissance appearance. Today, it stands as a testament to the region's rich history and architectural heritage.