When the iconoclastic revolts occurred in Italy, and the Popes broke with the Empire, the Lombard kings thought that their opportunity to conquer all Italy had come. But instead of making one bold campaign against Rome and the South, they merely laid hands on a few border cities. The Popes turned with frantic appeals for help to the only power that could help them, the Franks. Every time the Lombard king made a hostile move, the Pope cried aloud for aid. For some time the Franks deemed that the balance of political considerations was against intervention and refused to take part in Italian affairs. Charles Martel, mayor of the palace and ruler of the Franks in all but name, stood firm on the policy of non-interference; but his son and successor, Pippin the Short, took a different view. Pippin judged that the time had come to depose the royal Merovingian family and to exalt his own, the Carlovingian, in its stead. As the Merovingians had reigned for two hundred and fifty years, the step was revolutionary, and Pippin wished to strengthen his position by the support of the Papacy. He sent messengers to the Pope, Zacharias, to ask advice; and the Pope, according to the chronicler, "in the exercise of his apostolical authority replied to their question, that it seemed to him better and more expedient that the man who held power in the kingdom should be called king and be king, rather than he who falsely bore that name. Therefore the Pope commanded the king and the people of the Franks, that Pippin, who was using royal power, should be called king and should be settled on the throne." The last Merovingian, therefore, was tonsured and stowed away in a monastery, and Pippin became king of the Franks (751). Without accepting the monkish chronicler's statement, that the Pope commanded Pippin to be king, there can be little doubt that the papal sanction was of very real value to Pippin, and that Pippin let it appear that he was acting rather in conformity with the Pope's will than with his own. Thus the Pope laid Pippin under a great obligation; it now remained for Pippin to discharge that obligation. It was not long before the time came.