Physical or cultural frontier: a question of method. The example of the Imera-Salso sicilian valley

Facing the study of the frontier on the basis of archaeological evidence presupposes the construction of a rigorous methodological grid which acts as an interpretative filter of the evidence to be analysed. From the 1970s to the present, frontier studies have undergone a notable increase. The debate on the subject has expanded, directing research on several levels. This contribution proposes a model of analysis of the numismatic and archaeological documentation aimed at studying the frontier of the Imera-Salso valley in Sicily