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.
Galeazzo Maria Sforza Galeazzo Maria Sforza (24 January 1444 – assassinated, 26 December 1476) was the fifth Duke of Milan from 1466 until his death. He was famous for being lustful, cruel and tyrannical.