Voltumna Etruscan mythology, Voltumna or Veltha was the chthonic (earth) deity, who became the supreme god of the Etruscan pantheon, the deus Etruriae princeps, according to Varro. Voltumna's cult was centered in Volsini (modern-day Orvieto) a polis of the Etruscan Civilization of northwest Italy.The bond of the twelve Etruscan populi was renewed annually at the sacred grove of Fanum Voltumnae, the sanctuary of Voltumnus sited near Volsinii (present day Bolsena), which was mentioned by Livy.