Who was the "king's engineer" to the  King of Portugal, Naples, Sicily and Sardinia and Duke of Milan?
Tibúrcio Spannocchi Tiburzio Spannocchi (1541–1609) (also Spanucchi, Spanochi, Spanoqui, Hispanochi etc.) was "king's engineer" to Philip II of Spain and subsequently to Philip III of Spain. He was named "Chief Engineer" in 1601.
Prince Carlo Francesco of Savoy Carlo Francesco of Savoy (Carlo Francesco Maria Augusto; 1 December 1738 – 25 March 1745) was a prince of Savoy and Duke of Aosta. He was born in the reign of his father Charles Emmanuel III, King of Sardinia.