The structure is open on three sides. Coming from the lower part of town, you cross the first side, consisting of a rectangular entrance. On the right, the door is placed against a house. The left side is slightly curved and is made of: a first closed block in which there is a support pillar to the beam of the roof, and a painted niche; two openings of rectangular shape (divided by masonry) protected by wrought iron railings. The last side (the one where the exit is) consists of a round arch with soffit frame and brick.
The stretch of road before the door is straight and on the left side is characterized by a masonry wall of stone blocks and pebbles, bound with mortar and, at times, plastered. This wall has, at regular intervals, seven rectangular openings characterized by segmental arches (brick) closed by low wooden double doors as well as, a higher opening with a wooden door. On the basis of information received by the locals, it seems that through these openings the hay was thrown into the stalls below that are now partly collapsed. The portal is located in “ Via della Circonvallazione" ("street of the bypass"). Continuing on this road, you come to the parish church. The portal has a great panoramic view.
A single pitch angle covered with brick tiles. These are supported by casing formed by intersecting wooden joists and beams from the larger circular cross-section resting on the shoulders of the walls.
Squared stones and pebbles bound together by mortar. In some sections of the wall cement was used as a binder.
There is no specific paving for the portal; it is the same as in the rest of the historic center. It consists of interlocking concrete blocks; gray in color.
Source: Thesaurus montanus. I Beni Architettonici e Artistici della Comunità Montana Oltrepo Pavese, book and CD-ROM, ed. Torchio de’ Ricci, Certosa di Pavia, 2003