But in the course of the next few years Innocent was obliged to take up a totally different attitude in this struggle in consequence of disappointments elsewhere. There were two such which fell especially heavily upon him during the first half of his reign. He inherited from his predecessor a quarrel with Philip Augustus of France. Philip lost his first wife in 1190; in 1193 his designs against England caused him to marry Ingebiorg, a sister of the King of Denmark. Immediately after the marriage he took a dislike to her, refused to live with her, and obtained from an assembly of his own clergy a sentence of divorce, founded on an allegation of some very distant relationship between him and his new wife. Ingebiorg and her brother appealed to Pope Celestine III, who declared the sentence of divorce illegal and null. Philip not only paid no attention to the numerous letters and legates of the Pope, but he tried to make the divorce irrevocable by taking a new wife. After several rebuffs he found in Agnes of Meran, the daughter of a Bavarian noble, one who was willing to accept the dubious position (1196). Innocent III at once took up an uncompromising attitude, and instructed his legates that if Philip refused to send away Agnes and to restore Ingebiorg, they should put the kingdom under an interdict preparatory to a sentence of personal excommunication against Philip and Agnes themselves. Those bishops who dared to publish the interdict were seriously maltreated by the King; but after nine months of resistance the distress of his people at the cessation of religious services caused him to submit; he pretended to take back Ingebiorg, and the interdict was raised (1200). But he did not send away Agnes, and a renewal of the interdict was only averted by Agnes' death in 1201. Innocent, desiring to be conciliatory, actually declared Agnes' two children legitimate. Philip still, however, pressed for a divorce from Ingebiorg, declaring that he was bewitched by her. After his victory over John of England in 1204 he became more than ever obdurate to papal remonstrances, and he even contemplated a new marriage. Innocent was not in a position to drive him to extremes, and was obliged to temporise for a time. Eventually, however, he reduced Philip to submission.
[Sidenote: The Fourth Crusade.]
But Innocent suffered more definite defeat in the matter of the Crusade. The crusading fervour had much diminished, and it has been pointed out as characteristic of the age that a fourth crusade was determined on at a tournament in Champagne in 1199. Celestine III had vainly tried to rouse the interest of Europe, but the preaching of Fulk, the priest of Neuilly, recalled the efforts and the success of Peter the Hermit and St. Bernard. Innocent III lent his whole influence to the enterprise. But from the first everything seemed to go contrary to his wishes. The death of Theobald of Champagne (1201), who was the papal nominee for the leadership, placed at the head of the crusaders Boniface, Marquis of Montserrat, an Italian and kinsman of Philip of France and a typical representative of the worst side of feudalism. From that moment Innocent lost all control over the expedition. Instead of going directly to the Holy Land, the barons decided to attack the Mohammedan power in Egypt—perhaps the sounder policy. They made an agreement with the Venetians to find the shipping for the host in return for a large sum of money. But the long delay caused many crusaders to set off to the Holy Land; so that when the main force arrived at Venice it was so diminished in numbers that the leaders could not raise the sum for which they had pledged themselves to Venice. Probably there was no deep-laid plot for the diversion of the crusading host from the first. But the Venetians suddenly found themselves with the practical direction of a formidable army; they had enemies in the Adriatic against whom they had hitherto been powerless; they had old causes of rivalry and enmity with Constantinople. At the same time King Philip of Germany was urging the cause of his brother-in-law, who had been deposed from the Byzantine throne. The crusaders, unwilling to disperse and unable to insist, allowed themselves to be diverted, first to an attack upon Zara, a nest of pirates in the Adriatic, although it belonged to the King of Hungary, who was himself a crusader; and then to Constantinople, which they ultimately captured (1204), and where they set up a Latin Empire. Innocent did everything to prevent this diversion of his cherished scheme. He forbade the attack upon Zara, he excommunicated the Venetians for going to Constantinople, and threatened the whole host with the same penalty. But he was powerless. The few in the army who were moved by some of the crusading spirit were overruled; and when the papal legates for the expedition to Palestine joined the army at Constantinople, all thought of going on to Palestine was abandoned. Innocent was forced to accept what was done and to console himself with the thought of the blow thus dealt to the Eastern Church.
[Sidenote: Innocent's difficulty.]
These rebuffs seriously diminished Innocent's influence in Europe for a time. Moreover, Innocent soon had reason to regret his championship of Otto. Philip was wealthy and personally popular, while Otto's brusquerie and selfishness alienated many supporters. Consequently from 1203 Philip distinctly obtained the upper hand, and at length in 1207 Innocent opened negotiations with him. But these were rendered futile when Philip fell victim to the assassin's knife in June, 1208. Otto's acceptance now became inevitable, and he did everything to conciliate his opponents. He submitted himself to a fresh election by the German nobles, and won the Hohenstaufen by marrying Beatrice, the daughter of his late rival. He made new concessions to the Pope, which practically amounted to a renunciation of the powers confirmed to the Emperor in the matter of elections by the Concordat of Worms; he undertook to give up the right of spoils and to help in the eradication of heresy. And all this he promised because he was "King of the Romans by the grace of God and of the Pope."
[Sidenote: Otto's designs.]
But Otto's acceptance was only the beginning of the end. He knew that he owed his position merely to the accident of Philip's death and to the absence of any eligible Hohenstaufen candidate. He had therefore no feelings of gratitude towards Innocent. Moreover, he was now surrounded by Ghibelline influences, and was anxious to be crowned emperor. Thus, despite his promises of 1201 and 1209, to recover to the Papacy all the lands and rights which it claimed, he began to realise that the task to which he must give himself was the restoration of the connection between Italy and Germany, which had been entirely broken since Henry VI's death. In fact, this Guelf prince took up the work of the Hohenstaufen. When, therefore, Otto and Innocent met in Italy a year later, Otto declined to give more than a verbal promise that after his coronation he would do what was right. Innocent, in return, did not refuse the crown indeed, but made a new departure in naming Otto Emperor without consecrating him as such, and thus denied to him the divinity of the imperial office (October, 1209).
[Sidenote: Otto's success.]
Otto immediately set to work. He recovered for the Empire all the lands of Central Italy which Innocent had already annexed to the papal dominions, including, of course, the Matildan inheritance; he made the Roman Prefect an imperial officer again; and entering into alliance with the German followers of Henry VI, who had never been entirely dislodged from the southern kingdom, he overran Apulia and prepared, by the aid of a fleet lent by Pisa, to pass over into Sicily. Innocent did everything in his power to check the conqueror. He excommunicated him (August, 1210); in conjunction with Philip Augustus of France, the old ally of Henry VI, he roused disaffection against Otto among the German nobles. Innocent was somewhat taken aback when Otto's subjects, finding that the Pope in his anathema had absolved them from their fealty to the King, held Otto as deposed, and proceeded to elect in his place the young Frederick Roger, Henry VI's son and the papal ward, who was already King of Sicily. This choice also threatened to produce that very union of Germany and Italy which Otto was bent on accomplishing. But the need of checking Otto forced Innocent to acquiesce, and Frederick did everything to allay the papal fears.
[Sidenote: Innocent and Frederick.]