The Mithraic Sanctuary or Mithraic Cave (Latin: Mithraeum) is a Roman monument in Győr-Moson-Sopron County, a former ritual site of the mystery religion associated with the cult of the god Mithras. The sacral building with a protective structure in the Fertő-Hanság National Park and the Fertő/Neusiedlersee cultural landscape, which is a UNESCO World Heritage Site, is a rarity, as there are only four such sites in Hungary: here, in Szombathely, in Aquincum (four in Aquincum) and in Sárkesz.