A unique look at the lives of two daughters that highlights the dichotomy of lives of royal women, as both daughters and mothers of kings, who also knew both prison and power.

The names of few medieval monarchs and their queens are better known than Eleanor of Aquitaine, uniquely queen of France and queen of England, and her second husband Henry II. Although academically labelled 'medieval', their era was the violent transition from the Dark Ages, when countries' borders were defined with fire and sword. Henry grabbed the English throne thanks largely to Eleanor's dowry because she owned one third of France.

Their daughters also lived extraordinary lives. If princes fought for their succession to crowns, the princesses were traded - usually by their mothers - to strangers for political power without the bloodshed. Years before what would today be marriageable age, royal girls were despatched to countries whose speech was unknown to them and there became the property of unknown men; their duty the bearing of sons to continue a dynasty and daughters who would be traded in their turn.

Some became literal prisoners of their spouses; others outwitted would-be rapists and the Church to seize the reins of power when their husbands died. Eleanor's daughters Marie and Alix were abandoned in Paris when she divorced Louis VII of France. By Henry II, she bore Matilda, Aliénor and Joanna. Between them, these extraordinary women and their daughters knew the extremes of power and pain. Joanna was imprisoned by William II of Sicily and worse treated by her brutal second husband in Toulouse. If Eleanor was libelled as a whore, Aliénor's descendants include two saints, Louis of France and Fernando of Spain. And then there were the illegitimate daughters, whose lives read like novels...