abstract:A panoramic view of a souterrain contemporary with a ringfort dating to around 700 AD, built within a much earlier barrow cemetery, in County Armagh, Northern IrelandSouterrain (from French 'sous terrain', meaning 'under ground') is a name given by archaeologists to a type of underground structure associated mainly with the Atlantic Iron Age. These structures appear to have been brought northwards from Gaul during the late Iron Age.