- The first farmers
- The first metalworkers
- Gallic and Gallo-Roman sanctuaries
- Gallic settlements
- Gallo-Roman settlements
- The Middle Ages and the birth of the rural world
Despite the abundance and richness of Gallic necropoli (particularly in the department of Aisne), prior to aerial archaeology, no pre-Roman sanctuary had been studied, even though a number of pits and trenches had been observed in the vicinity of large graves. On the other hand, we know of a number of Roman-era temples, whose stone foundations had been described a long time ago. Some of them were even the subject of large-scale excavations, like at Champlieu, a town near Orrouy (Oise), at "Mont Berny" near Pierrefonds (Oise) and at "Bois l'Abbé", near the town of Eu (Seine-Maritime).
It is only in the past fifty years that aerial archaeology has revealed a large number of Gallo-Roman sanctuaries. From excavations we have seen that religious areas that predated the conquest often preceded them.
Although "classic" Greco-Roman temples have rectangular layouts, almost all Gallo-Roman temples, which have stone foundations but are from an native tradition, have a square, or nearly square, floor plan. This is unquestionably a Celtic tradition. In addition, large Gallic tombs are, in the same manner, surrounded by a square ditch, while circular moated moated systems, for both ritual and funerary purposes, lasted into the Roman era, and even into the High Middle Ages.