To the south of building IV,V,7 and to the south-west of the Macellum is the Courtyard of Dionysus, named after a mosaic in building IV,V,9. Below building IV,V,7 the atrium of a republican domus was found. It had building phases from the second and the first half of the first century BC. The peristylium of this house later became the courtyard. Brick and travertine columns in the north and south part of the courtyard belong to the original domus. Later a large, rectangular basin was set between the columns in the back part.

On the west perimetral wall of the courtyard part of polychrome marble decoration is preserved, above which are solid red paintings.