The Ducal Palace is located on the former fifteenth-century building of Torelli Conti, completed in the next century by Cesare Gonzaga, designed by Francesco Capriani said Volterra. Becoming the seat of the Gonzaga court, it came to be the main building of the civil power of the Duchy of Guastalla, hosted important poets and artists such as Tasso, was repeatedly stripped to the passage of armies. Recently switched to public property underwent a recent restoration that has recovered the architectural layout, rediscovering the old party decorations. It is now home Information Office and, on the main floor of the City Museum, currently unusable waiting for restoration after the 2012 earthquake.