Barely known in the English-speaking world, Countess Matilde of Tuscany was a trailblazer who defied the gender expectations of her age, eventually becoming the most powerful woman in the Holy Roman Empire. Lotharingia is a fictionalised re-telling of her youth, as she grapples with the constraints of femininity in her quest for self-definition, power, and love.

Countess Matilde is the sole heir to Tuscany, a descendant of Charlemagne, and a trained warrior, but a woman can only rule with a powerful husband at her side. Even her formidable mother's mysterious relics and diplomatic nous cannot change Rome’s mind about her betrothal to the duke of Lotharingia, a man who fills her with dread.

Across the Alps, Matilde’s overlord, King Heinrich of Germany, is coming of age, in a court rife with intrigue. His request to divorce sends shock waves through Christendom, and Rome, alarmed at the potential political consequences, decides that Matilde's marriage can no longer wait.

When, after a chance meeting, Heinrich rescues Matilde from her abusive husband, friendship blossoms into forbidden love, a love with unexpected consequences.

A sweeping medieval drama - Star-crossed love, power, Machiavellian intrigue, and relic hunting.