Irish folklore leprechaun, banshees, changelings and many others. The origin of these Irish fairies could be dated back to the ancient Celtic beliefs of pagan Gods and supernatural beings. However, there is no linear path that traces the development of fairy lore in Ireland from its origin. Irish fairy lore has influenced many English authors, such as Jonathan Swift, who wrote Gulliver's Travels while living in Ireland. Ó Súilleabháin was part of the Irish Folklore Commission, "Béaloideas". Not long after the foundation of the commission he created two books for the collectors. The first, in 1937, a shorter volume in the Irish
Irish folklore “enforce Christian ideals but still remain as a concession to early fairy belief systems”. Christianity altered the importance of some beliefs and define a new place for them in folklore. For example, fairies, who were previously perceived as God, became merely magical, and of much lesser importance. Along with it, a fusion of folklore legends and Christianity was witnessed. One of the major example of this is the existence of legends featuring both Saint Patrick, a central figure in the Irish church, and fairies (for example, “The Colloquy of the Ancients” is a dialogue between Saint Patrick and the ghost