This store-building measures c. 59 x 45 meters. It has been excavated only partly. It was built with opus reticulatum with a few bricks, that has been dated to c. 50 AD. In the interior are rooms (7 x 4 meters) arranged around a courtyard. A curved wall in the north-west part has been dated to the fourth century (opus latericium). Recent geophysical research by Michael Heinzelmann suggests that it is part of the arena of a small amphitheatre, that had been installed in the building. Nearby is a large concentration of basalt blocks, possibly a dump of the excavators.