In 2000 geophysical research, conducted by the German Archaeological Institute in Rome and under the direction of Michael Heinzelmann, led to the discovery of a large warehouse to the east of the so-called Imperial Palace. It was built in the second century AD.

The west part of regions I and III with new discoveries, resulting from the geophysical research
by the German Archaeological Institute in Rome. Numbers indicate trenches. The horrea are at number 22.
Plan: Michael Heinzelmann.