For ten points, name this Holy Roman Emperor with a red beard.
Rahewin of Freising completed the first biography of this ruler. As a concession to Henry Jasomirgott, this ruler issued the Privilegium Minus, which created a new duchy and gave increased autonomy to Austria. One military campaign by this ruler resulted in the capture and execution of Arnold of Brescia; that campaign was this man's destruction of the Commune of Rome, which he did at the behest of Pope Adrian IV. This ruler convened the Diet of Roncaglia, whose verdict the Lombard League did not accept since they considered it to be tantamount to the subjugation of Northern Italy. This ruler died while jumping into a river in the Third Crusade. For ten points, name this Holy Roman Emperor with a red beard.
Rahewin of Freising completed the first biography of this ruler.
{Frederick Barbarossa} or {Frederick} I