The Irish name for Dowth is Dubad, or darkness. In Celtic myth, Druid Bresal intends for Dowth to be a great tower that reaches the heavens. He employs all the men of Éire to build the tower in a single day. To aid in the task, Bresal's sister casts an enchantment that the sun will not set until the tower is complete. But Bresal is overcome with lust and commits incest with her, which breaks her spell and causes the sun to set before the men finish the tower. “Night has come upon us,” she laments, “and Dubad shall be the name of this place forever.” The name fits the mound, as both passages are oriented to sunsets--one to Samhain (Halloween) and one to the Winter Solstice, the longest night of the year.