Annwn, Annwfn, or Annwfyn (in Middle Welsh Annwvn, Annwyn, Annwyfn, Annwvyn, or Annwfyn) was the Otherworld in Welsh mythology. Ruled by Arawn (or, in Arthurian literature, by Gwyn ap Nudd), it was essentially a world of delights and eternal youth where disease was absent and food was ever-abundant. It became identified with the Christian afterlife in paradise (or heaven).