During excavation of the monument in the 1960s, a destruction layer was revealed in “hall A” consisting of the remains of the north wall, which carried a mural and wall mosaic on its south face.
From the study of the remains of the collapsed wall and surviving fragments of its decoration, important evidence concerning the position and size of the mosaic emerged.
From the mapping of the locations at which the fragments were found fallen, and in combination with the study of the graphic reconstruction of the wall, it was concluded that the mosaic was centrally-placed vis-à-vis the doorway, and that it was framed by a mural. It consisted of a central composition of unknown subject enclosed by a frame (width: 0.30 m.) in which precious stones were depicted.
The representation began at a height of 9 meters from the floor of the hall and had a width of 12 meters. Its height cannot be precisely calculated, since the wall it decorated has not been revealed to its full extent. However, the remains that came to light allow us to conclude that it was at least 7.50 meters. Below the frame of precious stones and above the doorway opening there was an inscription in Latin. The left edge of the two fragments, found in the excavation of the hall in two successive rows, had a straight termination, which establishes that the text of the inscription, which was 2.70 meters in height and 4.30 meters in width, began from there. Fragments of two rows of letters (average height: 0.20 m.) have survived. The letters were constructed of brown glass tesserae and projected on an off-white background. We believe that the inscription referred to the repair of the building and possibly its donor.