Having recovered some previously unpublished fragments of the architectural decoration, the study proposes an analytical planimetric and metrological reconstruction of the monumental complex dedicated to the god Hadrian by Emperor Antoninus Pius, assigning all the surviving architectural elements to the temple and the four-sided portico that surrounds it, and definitively attributing reliefs with geographic personifications and slabs with trophies and weapons found in the area to the attic of the portico. Of the portico, the remains of the masonry preserved on the northern side are illustrated for the first time, referable to an elongated building with an exedra in the centre located behind the colonnade.