On an uncertain date perhaps around February 1136, the Welsh princess Gwenllian (or Gwenlhian, or Gwenliana) lost a battle to a Norman lord, who had her summarily beheaded. This execution occurred in the aftermath of the Norman conquest. Having taken England, those invaders had made inroads into its western neighbor, even temporarily occupying much of the country. But Welsh lords pushed the Normans back, and we find those Normans at this moment in disarray over an internal succession crisis — a period known as “The Anarchy”. Seeing the opportunity, Wales’s constituent principalities rose in a “Great Revolt”. Gwenllian, that hottie...