The kingdom Berengar attempted to maintain against his vassals and the Church was virtually abrogated by Otho I., whom the Lombard nobles summoned into Italy in 951. When he reappeared in 961, he was crowned Emperor at Rome, and assumed the title of the King of Italy. Thus the Regno was merged in the Empire, and Pavia ceased to be a capital. Henceforth the two great potentates in the peninsula were an unarmed Pontiff and an absent Emperor. The subsequent history of the Italians shows how they succeeded in reducing both these powers to the condition of principles, maintaining the pontifical and imperial ideas, but repelling the practical authority of either potentate. Otho created new marches and gave them to men of German origin. The houses of Savoy and Montferrat rose into importance in his reign. To Verona were intrusted the passes between Germany and Italy. The Princes of Este at Ferrara held the keys of the Po, while the family of Canossa accumulated fiefs that stretched from Mantua across the plain of Lombardy, over the Apennines to Lucca, and southward to Spoleto. Thus the ancient Italy of Lombards and Franks was superseded by a new Italy of German feudalism, owing allegiance to a suzerain whose interests detained him in the provinces beyond the Alps. At the same time the organization of the Church was fortified. The Bishops were placed on an equality with the Counts in the chief cities, and Viscounts were created to represent their civil jurisdiction. It is difficult to exaggerate the importance of Otho’s concessions to the Bishops. During the preceding