The oppidum of San Cibrán de Las was founded around the end of the 2nd century BC with an acropolis that was clearly separated from the areas of habitation. The urban structure, sculptures, solar alignments, and divine epigraphy found there indicate its religious function. The evidence of frequentation of the site prior to its foundation suggests that the activity there may already have been socio-religious, based on a pattern identified for that period in different parts of Europe.