The Petrocores took part in the resistance against Rome. Concentrated in a few major sites are the vestiges of the Gallo-Roman period-–the gigantic ruined tower and arenas in Périgueux (formerly Vesone), the Périgord museum's archaeological collections, villa remains in Montcaret, and the Roman tower of La Rigale Castle in Villetoureix. The earliest cluzeaux (artificial caves either above or below ground) can be found throughout the Dordogne. These subterranean refuges and lookout huts were large enough to shelter entire local populations. According to Julius Caesar, the Gauls took refuge in these caves during the resistance.