The Lombard Ghibellines, seeing so formidable a display of Guelfic power together with the more intimate union between the church and Naples, in spite of Castruccio’s success could not help feeling that their cause was in jeopardy, and therefore determined to support it by the imperial power; Parma and Bologna had already given themselves to Rome, the bishop of Arezzo was excommunicated and deposed; and besides Florence and Siena, San Miniato, Colle, San Gimignato, and Prato had made Charles their lord, the last even in perpetuity. This great extension of power gave the house of Anjou command over the greater part of Italy, and therefore no time was lost in despatching an embassy to implore the “Bavarian” (as Ludwig was called by those who did not wish to be anathematised) to meet the Italian Ghibellines or their ambassadors at Trent for the purpose of considering the best means of exalting the imperial dignity. [Illustration: A FLORENTINE OF THE UPPER CLASSES, FOURTEENTH CENTURY] Until the year 1322 Ludwig of Bavaria had been so occupied in struggling for the crown with his rival Frederick of Austria that he had no leisure to meddle with the peninsula; but the decisive battle of Mühldorf, in which four thousand men-at-arms were killed in repeated charges on the field, and Frederick of Austria was made prisoner, left him at liberty to employ himself in foreign politics and turn his attention towards Italy. Pope John XXII, whom he informed of the victory at Mühldorf, not having before decided on the candidate he meant to support, received the letter of Ludwig as his friend, and promised to aid him in the consummation of peace; but when the pontiff heard of the assistance afforded to his worst enemy, the excommunicated Galeazzo Visconti, in 1323, and of the Bavarian’s having compelled Raymond of Cardona, the papal general, to raise the siege of Milan, his anger exceeded all bounds. He insisted that as pope he was the only legitimate ruler of the empire during a vacancy, the only judge between two competitors; and until his decision was known no king of the Romans could exist; it was, he said, a grave offence against God, and a palpable contempt of the church to have exercised the powers of royalty without its sanction, and protected its enemies, especially Galeazzo Visconti and his brothers who had been declared heretics by the definitive sentence of a competent tribunal. Ludwig was therefore excommunicated, and again more solemnly in March, 1324, when he was also declared incapable of ever ascending the imperial throne. Frederick while in prison had been visited by Ludwig and treated with so much and such unusual generosity that he acknowledged him as emperor and was immediately liberated, ever after remaining his ally and intimate friend. Germany was then pacified, the pope’s intrigues there were all baffled, and the emperor prepared to visit Italy, to confirm his imperial dignity by a public coronation, and revenge himself on the pontiff.