Celtic mythology is stock full of strange creatures and wailing ghosts. But not all Celtic heros were Leprechauns. In fact, many of them were regular humans who surpassed normal spiritual and physical limits. Of the notable names is Brian Boru who was known as a fierce warrior, protector and king. He and his brother, Mahon, fought against the invasion or Norsemen. After his brother was murdered, Brian demanded justice slaying the King of the Norsemen. As history unfolded, Brian Boro is a proud Celtic figure. Learn his full story below.