At 125 m below ground level, it is the largest chamber of the mine, which was exploited in the nineteenth century, with a total of 20,000 tons of salt excavated.
It measures 40 x 17 m, and its floor area is of 680 m2 and is used as a meeting hall.
It can hold banquets, balls, parties, conferences, symposia, training sessions, concerts or theatrical performances for groups of up to 600 people.