[Sidenote: Culmination of the ecclesiastical power.] Gregory had carried his point. He had not only beaten back the Northern attack, but had established the supremacy of the ecclesiastical over the temporal power, and that point, with inflexible resolution, he maintained, though in its consequences it cost Germany a civil war. But, while he was thus unyielding in his temporal policy, there is reason to suppose that he was not without misgivings in his theological belief. In the war between Henry and his rival Rodolph, Gregory was compelled by policy to be at first neutral. He occupied himself with the Eucharistic controversy. [Sidenote: Friendship of Hildebrand and Berengar.] This was at the time that he was associated with Berengar, who lived with him for a year. Nor did the pope think it unworthy of himself to put forth, in excuse of the heretic, a vision, in which the Virgin Mary had asserted the orthodoxy of Berengar; but, as his quarrel with King Henry went on to new excommunications and depositions, a synod of bishops presumed to condemn him as a partisan of Berengar and a necromancer. On the election of Gilbert of Ravenna as antipope, Gregory, without hesitation, pushed his principles to their consequences, denouncing kingship as a wicked and diabolical usurpation, an infraction of the equal rights of man. [Sidenote: The German contest resumed.] Hereupon Henry determined to destroy him or to be destroyed; and descending again into Italy, A.D. 1081, for three successive years laid siege to Rome. In vain the amorous Matilda, with more than the devotion of an ally, endeavoured to succour her beleaguered friend. The city surrendered to Henry at Christmas, A.D. 1084. With his antipope he entered it, receiving from his hands the imperial crown. The Norman allies of Hildebrand at last approached in strength. The emperor was compelled to retreat. A feeble attempt to hold the city was made. The Normans took it by surprise, and released Gregory from his imprisonment in the Castle of St. Angelo. An awful scene ensued. Some conflicts between the citizens and the Normans occurred; a battle in the streets was the consequence, and Rome was pillaged, sacked, and fired. Streets, churches, palaces, were left a heap of smoking ashes. The people by thousands were massacred. [Sidenote: The Mohammedans support Hildebrand.] The Saracens, of whom there were multitudes in the Norman army, were in the Eternal City at last, and, horrible to be said, were there as the hired supporters of the Vicar of Christ. Matrons, nuns, young women, were defiled. Crowds of men, women, and children were carried off and sold as slaves. [Sidenote: Sack of Rome, and death of the pope.] It was the treatment of a city taken by storm. In consternation, the pontiff with his infidel deliverers retired from the ruined capital to Salerno, and there he died, A.D. 1085.