Who was the "king's engineer" to the  King of Portugal, Naples, Sicily and Sardinia and Duke of Milan?
Philip III of Spain Philip III (Spanish: "Felipe" ; 14 April 1578 – 31 March 1621) was King of Spain. He was also, as Philip II, King of Portugal, Naples, Sicily and Sardinia and Duke of Milan.
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.