The big main door of the palace with nails' decorations and the coat of arms of Mansi family stands out against the façade, that is very simple. Palazzo Mansi was built in the 16th century, but it is impossible to date it exactly. Thanks to a drawing of 1684 we know that the building had already its current appearance. The graffiti, with whom the building was decorated, were made by Agostino Ghirlanda da Fivizzano, but they are today no longer visible. Palazzo Mansi is a building, which has a very unusual interior with a majestic, straight staircase, leading to the upper stories, where we find a loggia with Tuscan columns.

Unfortunately, little remains of the original furnishings: a Louis XV sitting room suite, the furniture of the Room of the Mirrors and some sofas.

At the ground floor entrance we see the old family's carriage and two sedan chairs, which are on the landings of the stairs. We see the beauty of the interior most of all inside the Music Room (with the gallery for the orchestra, frescoed by Gioseffo Dal Sole, a painter from Bologna), inside the rooms with the seventeenth-century tapestries by Juste D'Egemont, inside the Room of the Bridal Couple (1700) with the famous canopied bed in front of which there is a woman's portrait (maybe she was Lucida Mansi).