Balthazar Mendez de Loyola, born Muhammed El Attaz (1631 in Fez, Morocco – c. 15 September 1667, in Madrid, Spain) was a Moroccan prince converted to Catholicism.

El Attaz was captured and all his company by the Christian fleet of Balthazar Mandols before the Cap Bon.

[1] He then walked on the Italian ports to try to evangelize the captives "Moorish" held by the Christian armies.

[3] Sami Lakmahri, Moroccan journalist of monthly Zamane, said: "In the 17th century, on both sides, forced conversions are legion.

[2] Pedro Calderón de la Barca wrote about Loyola in 1668, shortly after his death, probably in order to support his trial beatification.