In the First Millennium BC, the tribes known as the Celts were the dominant force on the continent of Europe. In fringe regions like Ireland, the Celtic people continued to flourish long into the Christian Age. These were warriors with a unique way of life, as this fascinating episode reveals. Dark religious rituals and a love of bloody fighting were a vital part of their life, and classical writers condemned what they saw as a barbarian lifestyle. But we now know that Celtic culture was rich and sophisticated. Buried Celtic treasures have revealed their achievement in crafts such as jewelry, while the great legends of Irish literature confirm that epic storytelling was also part of the life of this still-mysterious ancient people.