The Vision of Adamnán or Adamnán's Vision, also spelled Adomnán, in Irish Fís Adamnáin (or Adomnáin), is a work of visionary literature written in Middle Irish in two parts, the first dating to the 11th century and the second the early 10th. It has sometimes been dated as early as the 8th or 9th century. Its authorship is unknown. The third-person narrative describes a vision of heaven and hell attributed to Adamnán (d. 704 AD), abbot of Hy and Iona, and primary biographer of Saint Columba.