Opened by the will of the Podestà Domenico Diedo in 1541, it is located at what was the Lower Castle (known as the Berri) built in the fourteenth century during the Paduan domination to defend against any war attacks.
It was later replaced by houses and shops and opened for civilian transit.
Today you can see some traces of the fresco made by Jacopo dal Ponte in 1541, depicting the episode in which Marco Curzio Rufo, Roman hero, throws himself into a huge abyss. Legend has it that a chasm opened in the city of Rome, which would have been saved only by the sacrifice of the most precious possession.
In the upper part are represented the imperial eagle and the Venetian lion, symbol of loyalty to the Serenissima.