" It was the last time in history that a pope was to crown an emperor; on that day the seven-hundred-year-old tradition, which had begun in ad 800, when Pope Leo III had laid the imperial crown on the head of Charlemagne, was brought to an end. "

― John Julius Norwich , Four Princes: Henry VIII, Francis I, Charles V, Suleiman the Magnificent and the Obsessions that Forged Modern Europe