An Immram (pl. Immrama) is one of a class of Old Irish tales concerning a hero's sea journey to the Otherworld (see Tír na nÓg and Mag Mell). Written in the Christian era and essentially Christian in aspect, they preserve elements of Irish mythology. "Immram" is usually translated as "Voyage". Old Irish is the name given to the oldest form of the Irish language which can be more or less fully reconstructed from extant sources. ... For Irish Mythology, see Other World. ... In Irish mythology, Mag Mell (plain of joy), also called Tír na nÓg (land of the young), Land of the Living, the Many-colored land and the Promised Land, was a mythical realm achievable through death and/or glory. ... In Irish mythology, Mag Mell (plain of joy), also called Tír na nÓg (land of the young), Land of the Living, the Many-colored Land and the Promised Land, was a mythical realm achievable through death and/or glory. ... Anno Domini (Latin: In the year of the Lord), or more completely Anno Domini Nostri Jesu Christi (in the year of our Lord Jesus Christ), commonly abbreviated AD or A.D., is the designation used to number years in the dominant Christian Era in the world today. ... The mythology of pre-Christian Ireland did not entirely survive the conversion to Christianity, but much of it was preserved, shorn of its religious meanings, in medieval Irish literature, which represents the most extensive and best preserved of all the branches of Celtic mythology. ...

Medieval lists name seven immrama, three of which survive: The Voyage of Mael Dúin, the Voyage of the Ui Chorra, and the Voyage of Snedgus and Mac Riagla. The Voyage of Bran is classified in the same lists as an Echtra, or "Adventure", though it also contains the essential elements of immrama. The Latin Voyage of St. Brendan could also be called an immram. The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ... Saint Brendan of Clonfort or Bréanainn of Clonfort (c. ...

The immrama are identifiable by their focus on the exploits of the heros during their search for the Otherworld, located in these cases in the islands far to the west of Ireland. The hero sets out on his voyage for the sake of adventure or to fulfill his destiny, and generally stops on other fantastic islands before reaching his destination. He may or may not be able to return home again.