The Annals of Ulster () cover years from AD 431 to AD 1540 and were compiled in the territory of what is now Northern Ireland: entries up to AD 1489 were compiled in the late 15th century by the scribe Ruaidhrí Ó Luinín, under his patron Cathal Óg Mac Maghnusa on the island of Belle Isle on Lough Erne. The Ulster Cycle written in the 12th century, is a body of medieval Irish heroic legends and sagas of the traditional heroes of the Ulaid in what is now eastern Ulster and northern Leinster, particularly counties Armagh, Down and Louth. The stories are written in Old and Middle Irish, mostly in prose, interspersed with occasional verse passages. The language of the earliest stories is dateable to the 8th century, and events and characters are referred to in poems dating to the 7th.