Clastidium (modernCasteggio), was a village of theLigurian tribe ofAnamares (Marici named also) inGallia Cispadana, on theVia Postumia, 5 miles east of Iria (modernVoghera) and 31 miles west ofPlacentia.[1]
Here in222 BC,Marcus Claudius Marcellusdefeated the Gauls and won thespolia opima; in 218 BC,Hannibal took it and its stores of grain by treachery. It never had an independent government, and not later than 190 BC was made part of the colony of Placentia, founded in 218 BC.[1]
In theAugustan division of Italy, however, Placentia belonged to the 8th region,Aemilia, whereas Iria certainly, and Clastidium possibly, belonged to the 9th region,Liguria (seeTheodor Mommsen inCorp. Inscrip. Lat. vol. v. Berlin, 1877, p. 828).[1]
The remains visible at Clastidium are scanty; there is a fountain (theFontana d'Annibale), and a Roman bridge, which seems to have been constructed of tiles, not of stone, was discovered in 1857, but destroyed.[1]