This building has been dated to the Trajanic period (opus mixtum). It consists of a large hall, in which a few rooms were added later. Three large brick piers were set against the south-east wall. Against the same wall the beginning of a staircase was found. Where it leads to is a mystery. Two doors in the south-west wall give access to a wide corridor leading from the Decumanus to the unexcavated area. The south-east part of this corridor had a roof supported by four corner piers.