Near the Leproso bridge, there are remains of the ancient cryptoporticus of the Saints Quaranta, a complex of corridors covered by vaults, put on the edge of a natural difference in height which originally was within the Roman city.
The reference to the Saints Quaranta dates back to the Lombard period, when, in one of the corridors of the ancient structure, in honor of the forty martyrs of Sebaste much venerated until the Middle Ages, a church was built which has completely disappeared. After a very long decline, the archaeological area of the cryptoporticus can now be visited.
