9.5 km | 12.1 km-effort
The metal industry had its heyday in the Principality as far back as Antiquity. Many old reminders of this time remain visible: a furnace from the Roman era at Forge-
Philippe (Momignies), relics of old ovens at Baileux, a bloomery at Forges, Gallo-Roman relics at Virelles, etc.
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