It is a fortified house built in the 15th century but the building next to it is certainly older.
In the past, to get in, it was mandatory to pass a tower dating back to the 13th century, from the top of which the fortified entrance to the town was controlled.
Now, the tower no longer exists.
During the renovation works, frescoes dating back to the 1400s emerged displaying several important coats of arms.
The Portone Tower, together with the castle of the Brivio Marquis, were part of a system of fortifications and constituted the official entrance to the town for those arriving from Milan.
The tower house was perhaps the seat of the community or of some official and almost certainly belonged to the clergy.