Same remarks as for the so-called "Ordan-Larroque Opidium", AND, most important :
It is not an" opidium" or whatever. It was not bilt for military pruposes.
It was built for funerary purposes.
That's why this and the other similar constructions in the area are called in french "pile funéraire gallo-romaine".
Something is not right. This message is just to keep things from messing up down the road