Rhodolph, justly appreciating the power of the pope, sent him a letter couched in those terms which would be most palatable to the pontiff.
"Turning all my thoughts to Him," he wrote, "under whose authority we live, and placing all my expectations on you alone, I fall down before the feet of your Holiness, beseeching you, with the most earnest supplication, to favor me with your accustomed kindness in my present undertaking; and that you will deign, by your mediation with the Most High, to support my cause.

That I may be enabled to perform what is most acceptable to God and to His holy Church, may it graciously please your Holiness to crown me with the imperial diadem; for I trust I am both able and willing to undertake and accomplish whatever you and the holy Church shall think proper to impose upon me." Gregory X.was a humane and sagacious man, influenced by a profound zeal for the peace of Europe and the propagation of the Christian faith.
Gregory received the ambassadors of Rhodolph graciously, extorted from them whatever concessions he desired on the part of the emperor, and pledged his support.
Ottocar, King of Bohemia, still remained firm, and even malignant, in his hostility, utterly refusing to recognize the emperor, or to perform any of those acts of fealty which were his due.

He declared the electoral diet to have been illegally convened, and the election to have been the result of fraud, and that a man who had been excommunicated for burning a convent, was totally unfit to wear the imperial crown.

The diet met at Augsburg, and irritated by the contumacy of Ottocar, sent a command to him to recognize the authority of the emperor, pronouncing upon him the ban of the empire should he refuse.

Ottocar dismissed the ambassadors with defiance and contempt from his palace at Prague, saying, "Tell Rhodolph that he may rule over the territories of the empire, but he shall have no dominion over mine.