only allowed to return to his city on condition of allowing Arnald to remain there. After the death of Conrad III., in 1152, Eugenius III. hastened to win the support of the new King of the Romans, Frederic Barbarossa, by intimating that Arnald and his partisans were conspiring to elect another emperor and make the empire Roman in fact as well as in name. The papal favor seemed necessary to Frederic to secure his coveted coronation and recognition. Blindly overlooking the irreconcilable antagonism between the temporal and spiritual swords, he cast his fortunes with the pope, swore to subdue for him the rebellious city and regain for him the territory of which he had been deprived; while Eugenius, on his side, promised to crown him when he should invade Italy, and to use freely the artillery of excommunication for the abasement of his enemies. The domination of the Roman populace has not been wholly moderate and peaceful. In more than one emeute the palaces of noble and cardinal had been sacked and destroyed and their persons maltreated, and at length, in 1154, in some popular uprising, the cardinal of Santa Pudenziana was slain. Adrian IV., the masterful Englishman who had recently ascended the papal throne, took advantage of the opportunity and set the novel example of laying an interdict on the capital of Christianity until Arnald should be expelled from the city; the fickle populace, dismayed at the deprivation of the sacrament, indispensable to all Christians at the approaching Easter solemnities, were withdrawn from his support, and he retired to the castle of a friendly baron of the Campagna. The next year Frederic reached Rome, after entering into engagements with Adrian which included the sacrifice of Arnald, and he lost no time in performing his share of the bargain. Arnald's protectors were summoned to surrender him, and were obliged to obey. For the cruel ending the Church sought to shirk the responsibility, but there would seem to be no reasonable doubt that he was regularly condemned by a spiritual tribunal as a heretic, for he was in holy orders, and could be tried only by the Church, after which he was handed over to the secular arm for punishment. He was offered pardon if he would recant his erroneous doctrines, but he persistently refused, and passed his last moments in silent prayer. Whether or not he was mercifully hanged before being reduced to ashes is perhaps doubtful, but those ashes were cast into the Tiber to prevent the people of Rome from preserving them as relics and honoring him as a martyr. It was not long before Frederic had ample cause to repent the loss of an ally who might have saved him from the bitter humiliation of his surrender to Alexander III.[55]