Square building on the west side of the Agora.
Its foundation dates from the first half of the
Its facade, facing eastwards to the Agora, was lined with a row of columns or pilars delineating the entrances as well as decorative entrances closed by fences. The roof was supported by 16 ionic columns and had a central opening for ventilation and lighting. A U-shaped wooden bench run along the three inner sides of the walls.
Today, only the foundations and remains of what is presumed to have been a colonnade on the east side are preserved.