Under Casa Pallaveri and the Capitoline temple the structures of a sanctuary dating back to the first decades of the 1st century BC have been partially preserved. It is a cultural complex consisting of four large rectangular classrooms placed side by side on a common podium, each with an independent entrance and a pronaos (portico with columns) for access, within a terrace overlooking the decumanus. This monument, unique in the archaeological panorama of northern Italy, is attributable to high-level workers from central Italy, called to build a building in Brescia that would demonstrate the city's adherence to the cultural model of Rome, on the occasion of the granting of the Latin law (89 BC), as evidenced by its marvelous frescoes, a rare example of Roman republican painting in northern Italy.