Gregory IX. congratulates Coloman on ‘wiping out the heresy and restoring the light of Catholic purity,’[60] but the Pope was quick in discovering that these congratulations were premature. The Tartar invasion which in 1241 weakened Hungary was the strength of the Bogomiles of Bosnia. Nor, perhaps, did the slaughter of Ban Zibisclav and many of his bravest adherents by the horde of Khan Ugadai much affect the subjects whose creed and interests he had deserted. In 1246 Pope Innocent IV.[61] had to stir up a third Bosnian crusade, the conduct of which was entrusted to the Archbishop of Colocz—‘a man skilled,’ as was fitting in an archbishop, ‘in all the science of war.’ He received a cross from the Pope to fix upon his heart, and aided by the King Bela, of Hungary, renewed the pious work. Many heretics were butchered, others were cast into dungeons; and so great were considered the deserts of the archbishop, that the Pope transferred the church of Bosnia from Spalato to Colocz. But once more it was discovered that fire and sword had raged in vain. Heresy continued to be so rampant in Bosnia that from 1256 the episcopate of Bosnia, which had been renewed after the first crusade, lapses a second time.[62] The papacy next resorted to persuasion, the more so as during the last part of the thirteenth century the Hungarian suzerainty was becoming less and less binding on Bosnia. About the year 1260 the Minorite brothers of the order of St. Francis of Assisi were sent into Bosnia to aid the Dominicans, who had been already established here.[63] At the end of the thirteenth century Bosnia passed for a while under the overlordship of the Prince of Serbia, and Stephen Dragutine, who was favourable to the Roman church, allowed two Franciscan brothers to establish the Inquisition here in 1291.[64]