Sardinia were assumed to belong to the Roman Church. Spain, Hungary and Croatia were also claimed as her property, and an attempt was made to induce the king of Denmark to hold his realm as a fief from the pope. In his treatment of ecclesiastical policy and ecclesiastical reform, Gregory did not stand alone, but found powerful support: in England Archbishop Lanfranc of Canterbury stood closest to him; in France his champion was Bishop Hugh de Dié, who afterwards became Archbishop of Lyon. France Philip I of France, by his practice of simony and the violence of his proceedings against the Church, provoked a threat of summary measures. Excommunication, deposition and the interdict appeared to be imminent in 1074. Gregory, however, refrained from translating his threats into actions, although the attitude of the king showed no change, for he wished to avoid a dispersion of his strength in the conflict soon to break out in Germany. Pope Gregory attempted to organize a crusade into Al-Andalus, led by Count Ebles II of Roucy. Distant Christian countries Gregory, in fact, established some sort of relations with every country in Christendom; though these relations did not invariably realize the ecclesiastico-political hopes connected with them. His correspondence extended to Poland, Kievan Rus' and Bohemia. He unsuccessfully tried to bring Armenia into closer contact with Rome. Byzantine Empire Gregory was particularly concerned with the East. The schism between Rome and the Byzantine Empire was a severe blow to him, and he worked hard to restore the former amicable relationship. Gregory successfully tried to get in touch with the emperor Michael VII. When the news of the Muslim attacks on the Christians in the East filtered through to Rome, and the political embarrassments of the Byzantine emperor increased, he conceived the project of a great military expedition and exhorted the faithful to participate in recovering the Church of the Holy Sepulchre—foreshadowing the First Crusade. In his efforts to recruit for the expedition, he emphasized the suffering of eastern Christians, arguing western Christians had a moral obligation to go to their aid. Internal policy and reforms His lifework was based on his conviction that the Church was founded by God and entrusted with the task of embracing all mankind in a single society in which divine will is the only law; that, in its capacity as a divine institution, it is supreme over all human structures, especially