Stupor Mundi: The Life and Times of Frederick II Emperor of the Romans King of Sicily and Jerusalem 1194-1250

He was called Stupor Mundi - the Astonishment of the World. In an age when popes and emperors battled for supremacy over Christendom, Frederick II ruled with an audacity that stunned his contemporaries and still startles us now. A man who spoke six languages, corresponded with Muslim sultans, and staffed his Sicilian court with Jewish and Islamic scholars, he was simultaneously the most brilliant mind and the most dangerous rebel of his century. Lionel Allshorn's biography traces Frederick's turbulent reign across four decades and three crowns: Holy Roman Emperor, King of Sicily, and King of Jerusalem. Four times the papacy excommunicated him. Four times he endured, bent, or simply ignored the Church's fury. He negotiated peace with the Sultan of Egypt during the Sixth Crusade, recovering Jerusalem without bloodshed - a scandal to Christian warriors, a triumph of diplomacy. Allshorn captures a man of contradictions: an emperor who questioned eternal truths, a crusader who made peace with Islam, a monarch who governed through scholars and administrators of all faiths. This is the story of the last great medieval emperor, a figure so extraordinary that his contemporaries struggled to comprehend him.