 Through the agency of Raymond de Penyafort and with letters of protection from King James I of Aragon, he went on missionary journeys and compelled Jews everywhere to listen to his speeches and answer his questions, both in synagogues and at wherever else he pleased.He even required his audiences to defray the expenses of his missions.In spite of the protection granted him by the king, Christiani did not meet with the success that he had expected on his missions.