The 22m (72 ft) tall Salt House was erected on a rectangular plan of 33,82 x 18,40m (111 x 59 ft).
It is a four-storey building with a spacious attic. The walls of the Salt House were built with basalt stones and eld boulders on lime mortar with some clay. All the ceilings are wooden and they rest on wooden pillars. The oors are joined by ladder-shaped stairs, leaning on the ceiling beams. It is worth noticing that there was external plaster on the Salt House, whose remnants can still be found on the west facade. The Salt House, built between 1537-1539, had its height extended twice over the centuries. It took place for the rst time in 1556. It acquired an extra oor. It occurred for the second time in 1698. One unusual event happened during the history of this storage in 1673. 10 storks perched on the top of its roof on 10th August. Strangely, one of them was black. The birds sat without moving until the next, which stirred a lot of emotions among the townspeople. In 1807, during the Napoleonic Wars, the storage was converted into a prison for soldiers. It is known that in the early 20th century, it served as a reghting depot and continued to be used as such until 1945.