Chiusi Etruscan Guide 2025: City of Lars Porsena and Tuscany's Finest Etruscan Museum

How Lars Porsena captured Rome in 508 BC — and why the Romans later tried to pretend it never happened

The Porsena siege of Rome (508-507 BC — the Chiusine Etruscan king's capture of Rome following the expulsion of the Etruscan Tarquinius Superbus): the most politically embarrassing event in early Roman history and the one most systematically minimized by the Roman historical tradition. The specific sequence of events (as documented in Livy, Dionysius of Halicarnassus, and Polybius — the three primary ancient sources, who give mutually contradictory accounts precisely because the Roman historical tradition was embarrassed about the actual outcome): the Roman heroic tradition (Horatius Cocles at the bridge, Mucius Scaevola burning his hand, Cloelia swimming the Tiber) was specifically constructed to convert a Roman military defeat into a moral victory. The actual outcome: Porsena took Rome, held it for an uncertain period (the sources disagree on the duration), and concluded a peace treaty with the Romans that included the Roman surrender of substantial territory and the prohibition of Roman possession of iron weapons — the most complete military subordination of Rome by any enemy before the Hannibalic war of the 3rd century BC. The Roman cover-up: the specific Roman historical tradition insists that Porsena was "repulsed" by the heroism of Horatius, Mucius, and Cloelia — but the Roman historian Tacitus explicitly notes that the peace treaty terms (including the prohibition of iron weapons) are inconsistent with a successful Roman defense, acknowledging the cover-up within the Roman tradition itself.