The Macellum consists of a tuff quadriporticus with a hall for worship in an elevated position on the eastern side, in line with the entrance. The copies of two marble statues, a female and a male armed, are found on the niches of the side wall, together with the fragment of a larger statue, probably pertaining to an emperor, Titus or Vespasian, indicating how this area was intended for the imperial cult. To its left is a room for meetings of a sacred board and to the right a large room with a masonry counter perhaps for fish to be sold.

There was a circular structure (tholos) at the centre of the courtyard, which was also used for selling and cleaning fish; the shops are lined up along
the southern side. The walls of the porticoes were decorated with scenes from daily life, such as selling fish and poultry, and mythological subjects.

The building was built between 130-120 BC

Date of excavation: 1818; 1821; 1888