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.
Francesco d'Aquino, Prince of Caramanico Francesco Maria Venanzio Aquino, prince of Caramanico (27 February 1738, Naples - 9 January 1795, Palermo) was ambassador to London and Paris for the Kingdom of Naples and later viceroy of Sicily.