The Tuatha Dé Danann , known as the `` peoples of the goddess Danu '' , were the fifth invaders of Ireland .
It tells of a series of invasions or `` takings '' of Ireland by a succession of peoples , one of whom was the people known as the Tuatha Dé Danann , who were believed to have inhabited the island before the arrival of the Gaels , or Milesians .
Irish mythology