Palazzo Ducale
The building was once the home of Gonzaga family reportedly from 1328 to 1707 .It has more than 500 rooms and thus a visit to such a monument will definitely be worth considering. The building is open from Tuesday to Sunday from 8:45Am to 7:15 Pm Italian time. It should take you three hours but the most important room, worth visiting is the Camera degli Sposi, known for its famous Mantegna paintings.