The unsuccessful flight of John XXIII not only enabled Sigismund to assume a more authoritative position in the council and in Germany; it also sealed his own fate. The council had no longer any hesitation in proceeding to the formal deposition of the Pope May 29, 1415. As the two popes who had been deposed at Pisa had never been recognized at Constance, the Church was now without a head. But instead of hastening to fill the vacancy, the council turned aside to the suppression of heresy and the trial of Huss. On three occasions, the 5th, 7th, and 8th of June, Huss was heard before a general session. No point in his teaching excited greater animadversion than his contention that a priest, whether pope or prelate, forfeited his office by the commission of mortal sin. With great cunning his accusers drew him on to extend this doctrine to temporal princes. This was enough to complete the alienation of Sigismund, and after the third day's trial he was the first to pronounce in favor of condemnation. The last obstacle in the way of the prosecution was thus removed, and Huss was burned in a meadow outside the city walls on July 6, 1415. With the death of Huss ends the first and most eventful period of the Council of Constance. Within these seven or eight months Sigismund and the reforming party, thanks to the division of the council into nations, seemed to have gained a signal success. Sigismund had purchased his triumph by breaking his pledge to Huss, and for this he was to pay a heavy penalty in the subsequent disturbances in Bohemia. But for the moment these were not foreseen, and Sigismund was jubilantly eager to prosecute his scheme. Warned by the experience of its predecessor at Pisa, the Council of Constance was careful not to put too much trust in paper decrees. John XXIII was not only deposed, but a prisoner. Gregory XII had given a conditional promise of resignation, and had so few supporters as to be of slight importance. But Benedict XIII was still strong in the allegiance of the Spanish kingdoms, and unless they could be detached from his cause there was little prospect of ending the schism.