Celtic-speaking peoples were one of the most important population groups to spread across the ancient European continent. From 800 BC to 1050 AD, the story of the Celts is one of expanding power and influence followed by contraction and near extinction. Drawing on all possible sources, the author outlines the history of the Celts. He follows the evolution of their culture as it gained strength on its two thousand-year passage westwards through Europe, through the upheaval of the early middle ages to 'twilight' and decline in the west.