Built at the end of the 1500s like the one in the Open Hill valley, -in sandstone, formed by superimposing a pyramid on a vaulted parallelepiped.
2 meters thick and 7 meters high, it had its top lined with lead to ensure impermeability , necessary for the good preservation of gunpowder.
Walls and powder magazines are the only Venetian military structures that remain intact to this day.