This book provides an introduction to the history of medieval Wales, with particular emphasis on political developments. It traces the growth of Welsh princely power, and the invasion and settlement of Welsh territories by Norman adventurers which resulted in the erosion of Welsh princely authority in the south. The subsequent development of a powerful Welsh state under the leadership of the princes of Gwynedd was checked by Edward I in 1277, and thereafter the principality was deliberately overrun and destroyed. Despite valiant attempts, the English domination of Wales persisted, even beyond the advent of the Tudor dynasty.