This is the first comprehensive and fully documented study of the Empress Matilda to be published in English. Much of the serious work on her life and historical importance has never been translated from German, and almost all has concentrated on the years of her struggle with Stephen for the English crown. This book examines her career as a whole, including the years as consort of the Emperor Henry V and as regent in Normandy for her son Henry II. It illustrates the problems of female succession in the early twelfth century, and gives a balanced assessment of Matilda's character and achievements in the context of her own times.