At the centre of the eastern side of the ambulacrum of the “great hunt”, in correspondence with the mosaic scene relating to the “land between two seas”, which symbolises Rome, the unifying city of peoples, is the entrance to a grandiose rectangular
is considered to be the most important place of reception, for public use, used for audiences of the dominus during his official duties. The rectangular hall consists of polychrome marble slabs,
only partly preserved, divided into seven bands with an east-to-west orientation. These contain squares and rectangles of different sizes and alternate with narrower aisles, mostly of solid-coloured alabaster. In the centre of the hall, a square with concentric circles placed inside it breaks the regularity of the pattern.
, along the midline, a second square larger than the first is visible.
Opposite the assumed position of the seat, there is a circular inlay that would have housed a
, of which only a few parts remain.
Porphyry, a precious marble, not only had an imperial use, but was also widespread in private residences with a public character.
A decoration with gilded mosaic tiles and glassy paste covered the vertical surface of the
, which housed the seat, underlining the authority of the dominus.
According to some scholars, the apse contained in the niche, a lost statue of
, whose divine virtues were symbolically transferred to the dominus of the villa.