 For this reason, the Romans set up several camps, for a better control of roads and adjacent areas.Castra were set up in the current neighbors of Ivrea, Turin and Cirié, where the soldiers could easily control access to the Lanzo valleys.The "castrum stativum" (permanent camp) in the Cirié area was called "Castra Cerreti", deriving this name from the turkish oak ("Quercus Cerri"), an oak tree whose forests were abundant in the neighbors.