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.
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.