All this is borne out by his dealings outside Germany and Italy. He conducted a very extensive correspondence with princes as well as ecclesiastics all over Europe. Indeed this, as much as the despatch of legates and the annual attendance of bishops at the Lenten Synod, was one of the means by which the Papacy strove to make itself the central power of Christendom. These letters deal with all kinds of subjects and bear ample witness to his personal piety and high moral aims. But alongside of these come arrogant assertions of papal authority. He claims as fiefs of St. Peter on various grounds Hungary, Spain, Denmark, Corsica, Sardinia; he gives the title of King to the Duke of Dalmatia; he even offers to princes who belong to the Eastern Church a better title to their possessions as held from St. Peter. [Sidenote: His policy in France.] Gregory's great contest with the Empire has been described without interruption, as if it were the only struggle of his time, instead of being merely the most important episode in a very busy life. And if we ask in conclusion why it was fought out in the imperial dominions rather than elsewhere, the answer will be instructive of his character and methods of action. At the beginning of his pontificate his harshest phrases were directed against Philip I of France, who added to the crimes of lay investiture and shameless simony a scandalous personal immorality. Ultimately Gregory threatened him with excommunication and deposition. But he never passed beyond threats. The reason is to be found in the fact that Gregory was soon in pursuit of larger game. The French King only shared with his great nobles the investiture of the bishops in the kingdom. Moreover, the French bishops were not as a body great secular potentates like the German bishops. The opposition to reform in France was passive, not active. Crown, nobles, and Church stood together in opposition: there was no papal party. Not enough was to be gained by a victory, and there was great chance of a defeat. The result was that Philip continued his simoniacal transactions and never entirely gave up investiture, while Gregory allowed himself to be satisfied with occasional promises of better things. His dealings with the French bishops are equally inconclusive. For six years (1076-82) two of the papal legates divided France between them, practically superseded the local ecclesiastical jurisdiction, and acted with the utmost severity against all, ecclesiastics or laymen, who practised the methods now under condemnation. Great opposition was aroused and the legates went in peril of their lives. They were only carrying out strenuously the principles laid down under Gregory's guidance in many acts of synods and inculcated by Gregory in numberless private letters. And yet Gregory is found frequently undoing their acts, restoring bishops whom they have deposed, accepting excuses or explanations which cannot possibly have deceived him. [Sidenote: In England.]