Brian Boru (c.941 - 1014):
High King of Ireland
Brian Boru was born in Thomond and became King of Munster in 978. It was said that he united the kingdoms under his rule, reformed the Church and defeated the Scandanavian settlers of Dublin at the Battle of Clontarf where he died, having gained sovreignty over all of Ireland. His body was brought to Armagh and buried in the Cathedral.