The 2011 field research has been held in the south-east side of the ancient Forum, as a prosecution of the previous campaigns (2007-2010), during which a taberna (the third one starting from the south corner) had been excavated. Immediately next to the north, a part of a great monumental building has been discovered: it is rectangular in plan (length ca. m 18,50, width as excavated ca. m 5,50), and it is disposed on three different levels, the lowest one corresponding to the level of the paved pedestrian passage next to the Forum, the upper to the level of the paving of the “via della Medusa”.

The building technique is a polygonal masonry, which has been maintained since the first phase till the latest restoration of the construction: thus it is absolutely different from the technique employed in the adjoining tabernae. The excavation of this field campaign has been limited to the upper strata of ground ( humus and colluvium ), and it has discovered an archaeological situation dating to the latest, post-classical phases of life of the structure. Nevertheless the materials found are completely different from the ones which had been recovered in the adjoining taberna n. 3. Noteworthy are some fragments of black-gloss ware (some part of miniature cups, others with rests of inscriptions), and of terracotta votives (heads, anatomical offerings), which are typical of the Middle Republican votive contexts and seem to suggest the existence of a nearby temple .

The building underwent a number of structural phases, being reused many times and spoiled since the late antique period, when, in a date before the middle of the V century A.D. the porch in the front was closed by walls made by reused blocks.