A seanchaí ([ˈʃan̪ˠəxiː] or [ʃan̪ˠəˈxiː] – plural: seanchaithe [ˈʃan̪ˠəxɪhɪ]) is a traditional Gaelic storyteller/historian. In Scotland, they were called seanchaidh ([ˈʃɛnaxɪ]) (plural seanchaidhean). A commonly encountered English spelling of the Irish word is shanachie.
The word seanchaí, which was spelled seanchaidhe (plural seanchaidhthe) before the Irish-language spelling reform of 1948, means a bearer of "old lore" (seanchas). In the ancient Celtic culture, the history and laws of the people were not written down but memorized in long lyric poems which were recited by bards (filí), in a tradition echoed by the seanchaithe.
Seanchaithe were servants to the chiefs of the tribe and kept track of important information for their clan.They were very well respected in their clan. The seanchaithe made use of a range of storytelling conventions, styles of speech and gestures that were peculiar to the Irish folk tradition and characterized them as practitioners of their art. Although tales from literary sources found their way into the repertoires of the seanchaithe, a traditional characteristic of their art was the way in which a large corpus of tales was passed from one practitioner to another without ever being written down.
Because of their role as custodians of an indigenous oral tradition, the seanchaithe are widely acknowledged to have inherited – although informally – the function of the filí of pre-Christian Ireland.
Some seanchaithe, however were not part of a clan. Some were itinerants, traveling from one community to another offering their skills in exchange for food and temporary shelter. Others were members of a settled community and might be termed "village storytellers" who told their stories and tales at ceremonies and community events, similar to the servant Seanchaithe.