In the 17th century, Sabbatai Zevi, a Sephardic Jew whose ancestors were welcomed in the Ottoman Empire during the Spanish Inquisition, proclaimed himself as the Jewish Messiah and called for the abolition of major Jewish laws and customs. After he attracted a large following, he was arrested by the Ottoman authorities and given a choice between execution or conversion to Islam. Zevi opted for a feigned conversion solely to escape the death penalty, and continued to believe and practice Judaism along with his followers in secrecy. The Byzantine historian Doukas recounts two other cases of forced or attempted forced conversion: one of a Christian official who had offended Sultan Murad II, and the other of an archbishop.