Brian Boru Harp in Trinity College Dublin, [The Brian Boru harp.] not originally from the time of Brian, but was made in 1220 for Donnchadh Cairbre O'Brien, King of Thomond, it has 30 metal strings. Throughout its history the harp was in the possession of many including some kings.
Brian Boru was probably the most successful warlord king in Irish history. He is known as the last High King of Ireland and is even credited with seeing off the Vikings who had terrorised the Irish for over 200 years.