ROMAN OR GAULIC: ORIENTATION AS A FOOTPRINT OF CULTURAL IDENTITY?

Abstract

The towns of Aventicum (Avenches, Switzerland) and Augusta Raurica (Augst, Switzerland) were the main

Roman towns of the Civitas Helvetiorum in the province of Gallia Belgica (and later shifted to Germania

Superior). Both were probably founded ex–nihilo, the first at the time of Claudius (mid first century AD), the

second by Caius Munatius Plancus around 44 BC and was refounded soon after the 15 BC . The layout of

both towns conforms to all Roman standards with an urban grid in orthogonal shape and with several

public buildings to hail the splendor of Roman society. Also the orientation of such grid seems to conform to

most Roman standards. The archaeoastronomical study of both towns is contextualised following two paths.

Firstly, we consider the orientation of the layout of some other regional Roman foundations as Vesontio

(Besançon, France), Iulia Equestris (Nyon, Switzerland), Forum Claudii (Martigny, Switzerland), and

Vindonissa (Windisch, Switzerland).

Secondly, we realize that the sacred areas (including temples, sanctuaries and often theaters) of this two

towns seem to break the general layout in both of them: these appear to bear orientations skewed several

degrees with respect to the general grid. In both cases a Roman theater seems to feature some kind of

relation with the temple as in other areas in the Roman Empire. Notably, the orientation of these temples

share similarities to other sacred precincts in the region possibly built prior to the Roman conquest.

This duality in orientations, with a grid with an orientation different to that of some of the main public

buildings may be a witness to a period when a compromise, negotiation, or resistance either implicit or

explicit, took place between conquered and conquerors. Interestingly, similar cases have recently been

reported in the Roman towns of Augusta Treverorum (present day Trier, Germany) or Augustodum (modern

day Autun, France).