The Aqua Traiana / Acqua Paola along the very busy Via Aurelia Antica, close to the Via del
Casale di S. Pio V. In general: the better masonry work, the older the structure: note the 'repair' of the
masonry brick in the middle of the photo. Above the course some opus reticulatum with above it the
'modern' (early 17th c ad) structure of the Acqua Paola.