The title "Duke of Naples" refers to a noble title historically associated with the Kingdom of Naples, which was part of southern Italy. The title was established in the late Middle Ages and was often held by members of the Aragonese and Bourbon dynasties. The Duke of Naples played a significant role in the political landscape of Italy during the Renaissance and beyond. The title has been linked to various historical figures, including Charles III of Spain, who became Duke of Naples in the 18th century before ascending to the Spanish throne. The title is now largely ceremonial, reflecting the region's rich history and cultural heritage.