144 B.C. Work begins on Rome’s longest aqueduct, the 56-mile-long Aqua Marcia. The city has doubled in size since the last channel was built. 33 B.C. After the chaotic civil wars Octavian (later ...

Watch out for that bat behind you,” warned Luca Messina, a civil engineer who moonlights as a speleo-archaeologist with Sotterranei di Roma, Undergrounds of Rome, a local group whose members explore ...