Brian Boru (born c. 940, died 1014) was king of Munster, and the most famous High King of Ireland. He was born Brian Mac Cennétig.

He became known as Brian of the Tributes (Boru), because he collected monies from the minor rulers of Ireland and used these to rebuild monasteries and libraries that had been destroyed during Norsemen (Viking) invasions.

He died on Good Friday April 23, 1014 during the Battle of Clontarf against the Vikings.