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.
René of Anjou René of Anjou (Occitan: "Rainièr d'Anjau" ; French: "René d'Anjou" ; 1409–1480), also known as René I of Naples (Italian: "Renato I di Napoli" ) and Good King René (Occitan: "Rai Rainièr lo Bòn" ; French: "Le bon roi René" ), was count of Piedmont, Duke of Bar (1430–80), Duke of Lorraine (1431–53), Duke of Anjou, Count of Provence (1434–80), King of Naples (1435–42; titular 1442–80), titular King of Jerusalem (1438–80) and Aragon including Sicily, Majorca and Corsica (1466–70).