Slavic tongue in the celebration of Catholic service, recognizing that this would remove an obstacle to the propagation of the faith. Ninoslav’s last years were peaceful, but after his death, about 1250, there were civil wars stimulated by the antagonism between Catharan and Catholic. He was succeeded by Prijesda, who had remained Catholic since his conversion in 1233. Under pretence of supporting Prijesda, Bela intervened, and by 1254 he had again reduced Bosnia to subjection, leading, doubtless, to active persecution of heresy, although the transfer of the see of Bosnia to Kalocsa was not carried into effect.[332] It was about this time that Rainerio Saccone gives us his computation of the Perfects in many of the Catharan churches. In Constantinople there were two churches, a Latin and a Greek, the former comprising fifty Perfects. The latter, together with those of Bulgaria, Roumania, Slavonia, and Dalmatia, he estimates at about five hundred. This would indicate a very large number of believers, and shows how unfruitful had been the labors and the wars which had continued for more than a generation. In fact, although Bela’s long reign lasted until 1270, he failed utterly in his efforts to extirpate heresy. On the contrary, the Cathari grew ever stronger and the Church sank lower and lower. Even the Bosnian bishops dared no longer to remain in their see, but resided in Djakovar. So little reverence was there felt in those regions for the Holy See that so near as Trieste, when, in 1264, two Dominicans commissioned to preach the crusade against the Turks endeavored to perform their duty, the dean and canons hustled them violently out of the church, and would not even allow them to address the crowd in the public square, while the archdeacon publicly declared that any one who listened to them was excommunicate.[333]