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.
Maximilian Sforza Maximilian (Massimiliano) Sforza (25 January 1493 – 4 June 1530) was a Duke of Milan from the Sforza family, the son of Ludovico Sforza. He ruled 1512–1515, between the occupations of Louis XII of France (1500–1512), and Francis I of France in 1515. After the French victory at the Battle of Marignano, Massimiliano was imprisoned by the returning French troops. He waived his rights to Milan for the sum of 30,000 ducats and continued to live in France.