Not a hill in the geographic sense, no chance feature of the earth's creation. A constructed mound, built deliberately at the centre of the Island, at a site where Manannan's roads converge, where a keeill dedicated to St John stood before the Norse arrived, and where the midsummer gathering had taken place since before written record. The Norse established their thing-vollr at an already-sacred site. The Manx name Cronk-y-Keeillown preserves the pre-Norse chapel. The name Tynwald preserves the Norse assembly. The roads preserve Manannan. Three layers of meaning in one constructed mound.