Archaeological excavations undertaken in Piazza Municipio during the construction of an underground station identified, in the 16th century ditch of the fortifications of Castel Nuovo, the portico and channels alongside an Angevin road linking the ancient town centre to the Reggia. Moreover, further remains of contemporary buildings were identified, probably relating to the palaces, known from the sources, which Robert of Anjou had built for his children and which must have stood alongside those belonging to the notables of the kingdom.