Táin Bó Cúailnge, ‘The Cattle-raid of Cooley’, is a long prose tale from Christian medieval ireland, in which are recounted the deeds of Iron Age kings and heroes from Ireland's pre-Christian past. The text is a sophisticated recreation of pre-history from the point of view of a society that had been literate in both Latin and its own vernacular, Irish, for centuries. Based ultimately on history that could be traced in oral tradition back to before the coming of Christianity, the Táin may have emerged as a written text as early as the seventh century. However, the written text grew and changed over time, and different versions survive today. The earliest complete surviving version was written sometime in the eleventh or twelfth century and is preserved in the twelfth-century vellum codex today called the Book of Leinster. At the text's conclusion, there are two colophons, one in Irish, and one, unusually, in Latin: