Many repressive measures, passed by Frederick II, were introduced in order to please the Popes who could not tolerate Islam being practiced in the heart of Christendom, which resulted in a rebellion of Sicily's Muslims. This in turn triggered organized resistance and systematic reprisals and marked the final chapter of Islam in Sicily. The Muslim problem plagued Hohenstaufen rule in Sicily under Henry VI and his son Frederick II. The rebellion abated, but direct papal pressure induced Frederick to transfer all his Muslim subjects deep into the Italian hinterland, to Lucera. In 1224, Frederick II, Holy Roman Emperor and grandson of Roger II, expelled the few remaining Muslims from Sicily.