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.
Karl Joseph von Firmian Karl Joseph von Firmian (Trento, 15 August 1716 - Milan, 20 July 1782) was an Austrian noble, who served as Plenipotentiary of Lombardy to the Austrio-Hungarian Empire. His proper name was Karl Gotthard von Firmian, and in Italy known as "Carlo Giuseppe di Firmian". He was the nephew of Leopold Anton von Firmian.