The South Stoa formed an oblong hall with a mosaic floor, once measuring 56 x 10.50 m, surrounded on all sides by a raised platform. Only a tiny fraction of this floor, decorated with elaborate geometric patterns, survives today at the western end of the building — although a considerable part of it still existed in 1888. A row of Doric columns in the central axis, resting on square bases, supported the roof. On the south side a flight of steps (of which the rectangular foundations survive) led down into Sanctuary I. (…)

The building apparently served as cultic banqueting halls — a type of building developed from the original Greek banqueting hall by substituting continuous platforms for the individual stone-built klinai. On these raised platforms, about 0.80 m high, the worshippers rested during meals. The lay-out of the hall is closely related to similar buildings in the sanctuary of Apollo Hylates at Curium, erected after the earthquake of AD 76/77, and at Pergamon. Unfortunately, no existing text refers to banquets as part of the cult ceremonies of Aphrodite Paphia.