Foras Feasa ar Éirinn - literally "Foundation of Knowledge on Ireland" but most often known in English as "The History of Ireland" - is a narrative history of Ireland by Geoffrey Keating, written in Irish and completed c. 1634. It begins with a preface in which Keating defends the honour of Ireland against the denigrations of writers such as Giraldus Cambrensis, followed by a narrative history in two parts: part one, from the creation of the world to the arrival of Christianity in the 5th century, and part two, from the 5th century to the coming of the Normans in the 12th century.