Between via dei Laghi and l’Anagnina, in the area known as “Pantanicci”, there is much archaeological evidence which is often located beside modern roads which usually retrace the line of the ancient ones. Along the via della Mola, close to where the branch coming from the VIII mile of the via Latina forks, a number of ancient walls were sectioned during work undertaken in the 1970s to widen the modern road. During the recent rebuilding of the wall around the property within which the road falls, the exposed sections were cleaned and two trenches opened up hill from the road which ascertained the characteristics and extension of an ancient structure. The side along the road, 20.30 m long, was paved with opus signinum on top of a “frame” foundation in tufa concrete, open on the top and filled with dumped material. The walls of the foundation, although below ground, were built with a faced curtain wall. The base wall built abutting the terrain formed an interspace 2.54 m wide with the first of the foundation walls. This was filled with various materials whose function was to drain off water filtering into the structure. The remains of the building which faced onto the ancient road seemed to continue to the south-east in correspondence with the neighbouring property. The orography of the site suggests that the concrete structure was a substructure relating to the hill (cf, Vitruvius 1, 5, 7), as well as forming the foundations of one of the funerary monuments mentioned by De Rossi.