The "Castello Visconteo in Cusago" is a castle that was built by Barnabò Visconti, ruler of Milan, in the second half of XIV century. The building, quite close to Milan city, looks more like a residential villa than a true defensive structure and opens on a beautiful square. Unfortunately the castle itself is in rather poor conditions and cannot be visited. The 360 photo shows the main gate and the front square.
The area of current Lombardy was settled at least since the 2nd millennium BC, as shown by the archaeological findings of ceramics, arrows, axes and carved stones... continues on wikipedia