This man managed to get his childless marriage with Adelheid of Vohburg annulled by Pope Eugene III because his great-great-grandfather was a brother of her great-great-great-grandmother.
This man managed to get his childless marriage with Adelheid of Vohburg annulled by Pope Eugene III because his great-great-grandfather was a brother of her great-great-great-grandmother. This ruler helped revive Justinian's Law Code, receiving the political assistance of the Doctors of Bologna who studied it. He had the lands of his cousin Henry the Lion stripped for refusing to assist him in one battle. This ruler was excommunicated by Pope (*) Alexander III but reconciled with him after losing the Battle of Legnano to the Lombard League. He defeated the Sultanate of Rum in the Battle of Iconium before he drowned in the Saleph River during the Third Crusade. For 10 points, name this Holy Roman Emperor of the Hohenstaufen dynasty nicknamed for his red beard.
This man managed to get his childless marriage with Adelheid of Vohburg annulled by Pope Eugene III because his great-great-grandfather was a brother of her great-great-great-grandmother.
Frederick Barbarossa [or Frederick I, Holy Roman Emperor; Frederick III of Swabia; accept Friedrich for "Frederick"; prompt on Frederick] 