Region: Southern Europe · Coordinates: 45.053, 9.698 · 10 events
| Year | Source | Account |
|---|---|---|
| 223 BC | Polybius, Histories | The two consuls pass Placentia and defeat the Insubres |
| 218 BC | Polybius, Histories | Scipio crosses the Po and retreats to Placentia |
| 218 BC | Polybius, Histories | The beaten Roman troops retreat to Placentia |
| 207 BC | Livy, History of Rome (Ab Urbe Condita) | Hasdrubal lifts the siege of Placentia and sends six Gallic and Numidian horsemen to Hannibal |
| 200 BC | Livy, History of Rome (Ab Urbe Condita) | The Gauls take Placentia by storm, plunder and burn it, leaving only about 2,000 people amid the smoke |
| 193 BC | Livy, History of Rome (Ab Urbe Condita) | Sempronius reports that 10,000 Ligurians appeared near Placentia and plundered |
| 154 BC | Polybius, Histories | Opimius gathers an army at Placentia and marches into Liguria |
| 49 BC | Suetonius, Lives of the Caesars | While Pompey was still under arms, he dishonorably discharged the Ninth Legion at Placentia. |
| AD 69 | Tacitus, Annals and Histories | Cecina storms the walls of Placentia |
| AD 546 | Procopius, History of the Wars | The people of Placentia (Piacenza), besieged by the Goths, ate forbidden foods out of hunger. |