Question: Who was the "king's engineer" to the  King of Portugal, Naples, Sicily and Sardinia and Duke of Milan?
Sentence (from "Duke of Carcaci"): The estate of Cárcaci, from which the dukedom is named, is situated in Sicily, 20 miles north-west of Catania (where survives the ducal palazzo), at the junction of the River Simeto and River Salso.
Relevant evidence: No