When you're in Rome be sure to visit Ostia Antica, near the seashore. You can read about this old town in any Rome guidebook.
In the above photo is a plaque in commemoration of St. Monica with a quote from the Confessions of St. Augustine.
In the lower photo is the foundation of the old shop where persons traveling to Carthage would purchase their tickets, where St. Augustine would have stood. Also in the Confessions you can read how Augustine went to the baths at Ostia, all of which you can still see today.