The Plinth is a parallelepiped-shaped element that is under the base of the column to serve as a foundation, generally it is attached to the column itself, forming a unicum. On the base, there is a fragment of the shaft decorated with grooves with rounded angles.

It was very typical for some Roman constructions, in this case the natatio area of the baths, to be surrounded by a portico, thus allowing an opening in the central area over the pool. It is estimated that the height of this portico would be about 5 or 6 meters.