This is a commercial building, perhaps used for storage. In the second half of the fourth century the street to the east was partially blocked by walls set against insulae II and III, leaving an opening in the middle c. 1.30 wide.
There are three wide doorways in the east facade, one of which was blocked. In the south wall is a minor entrance. The building consists of an east-west running passage in the south part, and two large halls flanking a small room in the north part. The only masonry in the interior consists of a few piers and walls in the central part (opus reticulatum, mixtum, and vittatum).
The exterior walls are Trajanic, the interior ones Severan. Restorations have been dated to the second half of the fourth century.
Plan of the building.
North is to the left.
Boersma 1985, fig. 84.