When the papal envoy John of Plano Carpini protested Mongol attacks on the Catholic kingdoms of Europe, Güyük stated that these people had slain Mongol envoys in the time of Genghis Khan and Ogedei Khan. He also claimed that "from the rising of the sun to its setting, all the lands have been made subject to the Great Khan", proclaiming an explicit ideology of world conquest. The Khagan wrote a letter to Pope Innocent IV on the relations between the Church and the Mongols. "You must say with a sincere heart: 'We will be your subjects; we will give you our strength'. You must in person come with your kings, all together, without exception, to render us service and pay us homage. Only then will we acknowledge your submission. And if you do not follow the order of God, and go against our orders, we will know you as our enemy."