Fourth is the Historical Cycle, or Cycle of the Kings. The Historical Cycle ranges from the almost entirely mythological Labraid Loingsech, who allegedly became High King of Ireland around 431 BC, to the entirely historical Brian Boru, who reigned as High King of Ireland in the eleventh century AD. The Historical Cycle includes the late medieval tale "Buile Shuibhne" ("The Frenzy of Sweeney"), which has influenced the works of T.S. Eliot and Flann O'Brien, and "Cogad Gáedel re Gallaib" ("The War of the Irish with the Foreigners"), which tells of Brian Boru's wars against the Vikings. Unlike the other cycles there is not a consistent set of characters or locations in this cycle, as the stories settings span more than a thousand years; though many stories feature Conn Cétchathach or Niall Noígíallach and the Hill of Tara is a common location.