The Vision of Adamnán
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.