famous building in venetian style that represented the place on the border between Lombardy and the Republic of Venice. In the sixteenth century was used (keeping the sheep) for the manufacture of saltpeter, component of gunpowder. In the early years of the Seventeenth Century acted by customs to the transit of goods between Lombardy and the Republic of Venice. The vessels were in fact you to input passing under the imposing arches of its facade, before being able to access to the port from a side opening. Subsequently this function has failed with the fall of the republic. Access to the lake was buried and building other features, including Arsenal and factory saltpetre. During the fascist period was "casa del fascio". It was the subject of a recent renovation in 2003, following which the building was used as a congress center.