Táin Bó Cúailnge
The Táin Bó Cúailnge ("The Cattle Raid of Cooley") is an ancient Irish story.  It is part of a group of stories, the Ulster Cycle or Cuchulain cycle. Ulster is a place in northern Ireland where most of the story happens.  Cuchulain is the main hero of the story.  According to Professor John Dunn of Catholic University, who wrote an English translation in 1914, the Tain is the Iliad of Ireland.