International audienceLoire constitutes, in its western part, a major element in the structuring of the landscape and the territories that it crosses in historical periods. This observation, which can be applied to the Iron Age according to the texts of Strabo and Caesar in particular, has only really started to be documented by archeology in recent years. The aim of this contribution is therefore to bring together largely unpublished documentation in order to provide information on three main questions : Development and management of the watercourse (bridges, fords, banks, wrecks) ; The status and organization of sites related to the Loire, in a 50 km wide strip; Cultural entities crossed by the river. Bringing together the results of nume...