The current village of Laboissière-en-Santerre (Somme) was built in the proximity of and parallel to the ancient Gallo-Roman villa.
The location of the ancient Cistercian abbey at the place known as "Balance" at Vron (Somme), a site that still fits well within the current landscape.
With the exception of a few Neolithic remains from the Bronze and Iron Ages, as well as some native farms, all truly geometric structures are of human origin.
The problem is to distinguish which of these regular shapes are the work of human beings of today, and which were created by our ancestors, i.e. which of them we can consider archaeological.
As a general rule, ancient archaeological traces in the northern half of France are in total discord with contemporary structures. Thus, Gallo-Roman villas can almost never be found in the current landscape, even if a few very rare exceptions do exist, such as at Laboissière-en-Santerre (Somme).
On the other hand, in the south of France, modern roads sometimes go around Gallo-Roman sites, because the great invasions were less destructive, and did not give rise to a complete rearrangement of the rural infrastructure. In northern France, medieval archaeological structures are far from being as geometric as those from the Roman era, and they fit well into the landscape with respect to roads and current land allotments (Abbaye de Vron).