Located on the north wall of the vestibule was a cult painting. It depicted a Genius beside an altar performing a sacrifice with the tibicen and camillus, who carried a patera and rooster. On either side was a Lar holding a rhyton and situla. Coiled around the altar was a single serpent. In the lower zone of the painting were two other serpents, heading towards a masonry projection on which a pine cone was painted. Presumably this allowed a place for offerings to be left. Between these serpents stood a man with an amphora. Above his head is written 'HERMES', believed to be the owner of the inn.