Preiddeu Annwfn

Preiddeu Annwfn or Preiddeu Annwn is a cryptic poem of sixty lines in Middle Welsh, found in the Book of Taliesin. The text recounts an expedition with King Arthur to Annwfn or Annwn, the Welsh name for the Celtic Otherworld. Preiddeu Annwfn is one of the best known of mediaeval British poems.