This book covers both the royal families that existed in pre-Conquest Wales and the predominantly English royal families that have ruled over Wales since medieval times. The changing relationships between the rulers and the ruled in Wales are examined, over a period from the early Middle Ages to the present day. The aim is to tell the story of how Wales has figured in the development of the British royal family and its traditions. The author's previous books covered individual members of the royal families; although this book will inevitably cover individuals in the telling of the story, to some extent, the book will concentrate less on the personalities and more on the surrounding tradition and pageantry (e.g., investiture ceremonies), and there is ample scope for covering new ground. An index and select bibliography will be provided, as well as illustrations, the latter largely of monuments and locations in Wales associated with the book's theme.