Helen Castor explores the role of queens in medieval and Tudor England, analysing how they evolved from being the wives of kings to powerful figures in their own right - but faced great struggles to impose their authority in a male-dominated society. She begins by recalling the life of Matilda, the daughter of Henry I, who waged war against her cousin Stephen in the mid-12th-century in a bid to be recognised as her father's rightful successor. The historian also charts the turbulent life of Eleanor of Aquitaine, the wife of Henry II, who played a major role in governing England during the latter half of the 12th century