On a freezing night in 1142, a royal leader besieged at Oxford Castle wrapped herself in white cloth and slipped across the frozen river to safety. That escapee was Empress Matilda, who fought a devastating civil war for the right to become England’s first queen regnant. This deep dive looks past the dusty timelines to a capable, fiercely ambitious woman robbed of her rightful inheritance.

Sent to Germany at eight and crowned empress in Rome, Matilda gained real experience as imperial regent before her father named her heir to England. When Stephen of Blois seized the throne and treasury on King Henry I’s death, she invaded, sparking the conflict known as the Anarchy, then played a masterful long game to secure the crown for her son.

• Why she returned to Normandy carrying imperial crowns and sacred relics
• How the barons broke their sworn oaths out of xenophobia and sexism
• Her parallel government, royal charters, and minting of her own coins
• The debate over whether she was haughty or simply acting like a king
• The Treaty of Wallingford and her son’s crowning as Henry II