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.
Duke of Saldanha Duke of Saldanha (in Portuguese "Duque de Saldanha") is a Portuguese title granted by royal decree of Queen Maria II of Portugal, dated from November 4, 1846, to João Carlos Saldanha de Oliveira Daun (1790-1876), also known as Marshal Saldanha, leader of the liberal armies, during the Liberal Wars in Portugal.