The carvings on the orthostat along the southwest wall of the entrance to The Mound of the Hostages (Duma na nGiall) are not artwork, celestial representations or a calendar as some have theorized, but simply a map of The Hill of Tara, which predates the site as it appears today. When the engraving of the orthostat is rotated roughly 80 degrees clockwise, the carvings match eleven of the monuments on the hill with respect to location, orientation and scale.