"Be Thou My Vision" (Old Irish: Rop tú mo baile or Rob tú mo bhoile) is a traditional Christian hymn of Irish origin. The words are based on a Middle Irish poem that has traditionally been attributed to Dallán Forgaill. The best-known English version, with some minor variations, was translated in 1905 by Mary Elizabeth Byrne, then made into verse by Eleanor Hull and published in 1912. Since 1919 it has been commonly sung to an Irish folk tune, noted as "Slane" in church hymnals, and is one of the most popular hymns in the United Kingdom.