The investigations conducted on the site of the Great Baths of Aquileia by the University of Udine (2002-2014 in agreement; since 2016 under concession) identified limits and dimensions of the Constantinian building, geo-referenced the previous excavations (‘900), clarified the periodization of life in this area and contributed to knowledge of the building appearance, its foundations and some of its halls.

The 2019 campaign brought to light the northern limit of the thermal building, in correspondence with the large room with pools and fountains (S20), and the intersection, underlined by a protruding corner in limestone blocks, with the walls of the adjoining North Hall.
The walls are completely despoiled up to considerable depth. The emptying of the plundering trenches has made it possible to read the foundation system of the rooms inside the frame formed by the brick wall structures, confirming the hypotheses advanced in recent years. Also the foundations of rooms used bricks, alternating with thick layers of filler clay with waterproofing function and completed, under the mosaic pavement of the North Hall, by thick preparations in mortar, cocciopesto, layers with ceramic fragments and fine sand.

Some scraps of mortar levels outside the north of the building were also investigated; they testify that thermae were built on a light elevation.

Some geognostic surveys with continuous coring allowed us to read the stratigraphy of the foundation trenches and the subsoil in the northern area of the building; a deeper coring intercepted, in the natatio, one of the wooden poles of the sub-foundations, confirming the preliminary hypotheses.
The exceptional groundwater rise impeded some parts of the final documentation from being perfected and forced to postpone some consolidation works. The excavation area was however made safe, closed and covered with the greatest possible care.