The primary aim of this project is to conduct a cross-disciplinary study of underground religious expressions in Indo-European Hispania within the context of the polytheistic religions of antiquity over a long period of time, from the Iron Age to late antiquity. To this end, the intense cross-disciplinary research process will focus particularly on fieldwork, direct epigraphic and iconographic autopsies, spatial and geo-morphological analysis, and recording and mapping ritual spaces, texts, images and artefacts with cutting-edge technology.