Sacellum VIII 4, 24, facing directly onto the Via Stabiana, is part of a complex divided into a series of tabernae tabulatae, datable to within the 2nd century B.C. Seemingly planned as a single unit, it may be suggested that its construction was financed by a single individual.

This structure, generally interpreted as the Sacellum of the Lares Compitales, was originally connected to the rear entrance of the domus Cornelia via a blocked opening, and was very similar to contemporary niche-altar structures built up against the facades of houses in other zones of the city. The parts relating to cult practices consist of a central altar with successive wall re-facing within which were two cavities containing votive deposits, a bench along the south side and a niche to the north.

The present layout of the sacellum dates to the mid 2nd century B.C.; in the floor deposit the precise ritual which consecrated the area was attested by the presence of several small votive pits; large holes for the dumping of material connected to the cult were found along the walls of the structure. The two lower floor levels probably relate to an earlier phase of the sacellum (end of the 3rd-beginning of the 2nd century B.C.), to which it is likely that a tufa altar found in the excavation also belonged.

From the analysis of the deposits and the votive offerings it is possible to suggest that the sacellum was dedicated to the divinity Vulcan, in connection with the family Lares of the gens of the owners of the domus and the tabernae, two of which have been identified as a metal working establishment and a negotiator aerarius e ferrarius. In fact, it may be presumed that the production and sale of metals were the specific interest of the gens and that the cult dedicated to the patron of blacksmiths would have been situated in a quarter dedicated to metalworking. Therefore, the sacellum may be interpreted as the seat ( schola ) of a religious association, supported by the members of the family.