From Muslim crown prince to Jesuit priest

Muley Muhammad el-Attaz (sometimes style “el Abbas”) was born in 1631 in the Moroccan city of Fez as the son of the Saadian sultan Abd al-Malik al-Mu'tasim and his Andalusian wife Huali. The young crown prince was an accomplished commander and well-versed in the Quran. Sometime in the 1650s, he attempted to cross the Mediterranean to make the Hajj, but was captured by the Maltese. His captivity was mild and Muley Muhammad received the permission to gather other Muslims around him to explain the Quran to them. Yet when his ransom had been paid by the ruler of Tunis, he refused to return and instead asked to be received into the Catholic Church. On 31 July 1656 the crown prince of the Saddian dynasty was baptized, taking the name Baltasar Loyola de Mendez in honor of Baltasar Mandols, the commander of the Maltese Order who had captured him, and of the great saint on whose feast day he was baptized. Baltasar soon started studying for the priesthood and in 1661 entered the Society of Jesus in Rome.

After his priestly ordination, Fr. Loyola de Mendez worked successfully among the Muslim captives of Genoa, Naples, and other Italian ports, converting up to 2,000 of them. It is said that he even called a notable Muslim scholar from a well-known mosque in Fez to his side, converting him to Christianity. Fr. Baltasar desired to return to Morocco to preach the Gospel there, but was prevented from doing so by the civil war raging against Saadian rule. Instead, the Jesuit general granted him the permission to travel to the Muslim Mughal Empire as a missionary.

While traveling across southern Europe to reach India, the former crown prince garnered much attention among the clergy and the people, who called him the "king of the Jesuits". His meek yet regal demeanor made a lasting impression.

A portrait of Fr. Baltasar Mendez de Loyola, painted secretly without his knowledge

Unfortunately, his life was cut short by a fever he contracted in Madrid, where on his deathbed he converted the Moroccan slave of his doctor. Fr. Baltasar Loyola de Mendez, S.J. died on 15 September 1667. He was buried with royal honors at the behest of the Queen of Spain.

Fr. Baltasar's life soon inspired many plays in the Jesuits' educational institutions an beyond, with Calderón's "El gran príncipe de Fez" being the most famous.