A small room off the centre of the right side of the atrium functioned as a cult room. This room appeared to have initially served a different purpose, as the cult room dates to the last period before eruption. Against the east wall stood an aedicula shrine. This comprised of two doric columns in front and two rectangular pilasters at the rear which supported an architrave and pediment. It is believed that the tympanum orginally had a painting of a gorgan head on it. Excavation reports indicate that there was originally a gate on the aedicula that could be closed between the columns. The aedicula structure sat on top of a large masonry base. The base was coated in stucco and painted in red and yellow imitation marble. Around the top of the base ran a red stripe. In the centre of the base was an embeddded slab of marble with an inscription relating to household cult. The walls of the room were painted. On the right side of the aedicula were two male figures standing beside an altar. One of the men was holding an acerra. On the left of the aedicula were three men leading a bull to sacrifice. One of these men could be identified as the popa as they held an axe. All of the wall paintings were carried out in the fourth style and also included panels depicting plants, a cupid, and a swan. Above the wall paintings, a series of stucco cornices ran around the room. The floor of the room was cement.