Originally, the stone was along the old road linking Nivelles to Herstal over Jodoigne and Landen, all towns having deep roots in history (e.g.: Pépin de Herstal and Pépin de Landen are both prominent figures from the 8th century). This road was already traced at the time of the Roman Empire, and megaliths -- or traces thereof -- are not rare all along.
To be noted that the Romans, for sure energetic builders, did use whatever infrastructure was available, in particular roads already built by the Celts, often limiting themselves to improve them.
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