Below the Casa del Cardinale, on the western side of the fortress, lies a large room that once served as the castle’s cellar. This function is documented from the 15th century onwards. A letter by Michele da Prato mentions an “enormous cellar,” while another account recounts Emperor Frederick III’s visit, during which imperial soldiers reportedly entered the castle’s cellars, said to hold more than 1,000 some (a traditional unit of barrels) of wine.
The cellar was designed for storing wine and food supplies, taking advantage of its underground position to maintain a constant temperature and ideal humidity — conditions essential for ageing barrels. An ingenious ventilation system ensured air circulation without compromising security. Along the walls, niches once held tools and storage containers.
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