The thesis "The Sacred Berg" addresses the functions of the place name Berg in Norway duringthe Iron age. This study is based on the hypothesis that places with the name Berg wereconsidered sacred, and that this can be mirrored through archaeological traces of cultic activityduring the Iron Age. It addresses cult continuity based on archaeological traces of culticfunction in areas where early medieval churches have been erected. Based on previous researchin archaeology and name-examination the dissertation has an interdisciplinary perspective. Thestudy also addresses the place name Berg's nearby cosmological landscape. Five research areaswith the place name Berg have been included in this thesis, located in Øvre Eiker, Larvik,Halden, Asker and Frosta.