The double portico PC1-2 and the inner portico PC3 had columns which have disappeared. According to antiquarian texts they were removed by Caracalla or Constantine to be reused elsewhere. According to other scholars there were instead masonry pillars, which seems more likely, given their large number.
Nothing remains of the floor, and the walls do not have the holes for the nails of a marble revetment, so they had to be plastered and frescoed.
The Poecile was a huge closed garden, with a large water basin in the center, PC4. At the center of the east side is a large room PC5, in whose apse a base has been added, probably for statues. From there it was possible to access both the Maritime Theater and the Building with Three Exedras with service passages.
From the east end of the double porch PC1-2 two stairways go up to the Hall of the Philosophers. On the south side there was instead the entrance of the Building with Three Exedras and from there to the complex of the Imperial Residence.