Fragments of a 15th Century Plan
of Ancient Rome by Pirro Ligorio

(Narrative and maps provided by Andrea Pollett, Roma; key to map
                             shown below the larger map)

Key to the above map:

1 - Hadrian's Tomb (Castel Sant'Angelo), and Aelius Bridge (presently Sant'Angelo Bridge).
2 - Psamtik II's obelisk (still laying down by the Campus
     Martius, where it was found); just behind the obelisk is
     Mons Citorius (Citorius Hill), which is no longer there,
     although the Parliament's building is actually called
     Palazzo di Montecitorio.  On the left of the column is
     the Ustrinum (building used as a crematorium, no
     longer there).
3 - Circus Agonalis (piazza Navona).
4 - The Pantheon; just to the right are the Thermae
     Agrippae (Baths of Agrippa), a few remains of which
     can still be seen by a small street behind the Pantheon,
     via dell'Arco della Ciambella.
5 - Octavia's Porch, in front of Fabricius Bridge leading
     to the Tiber Island; behind the porch is the Circus
     Flaminius (no longer existing).
6 - Trajan's Column in front of the same emperor's markets.
7 - Baths of Diocletian (only mentioned, not pictured).
8 - This is probably the Castrum Praetorium, where
     presently the National Library stands.
9 - Sallustian Gardens.