Muirchertach Ua Briain

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Fanciful depiction of Muirchertach Ua Briain, High King of Ireland (died 1119).

Muircheartach Ua Briain (anglicised as Murtaugh O'Brien; c. 1050 – c. 10 March 1119), son of Toirdelbach Ua Briain and great-grandson of Brian Boru, was King of Munster and later self-declared High King of Ireland.

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