Now it's very easy to assume that those books, because they were from a library called Bait al-Hikma, were Muslim books, but that's not the case because the caliph that built that library, his name was al-Ma'mun -- he was Harun al-Rashid's son.
Maintenant, il est très facile de présumer que ces livres, parce qu'ils étaient dans une bibliothèque appelée al-Hikma étaient des livres musulmans, mais ce n'est pas le cas, car le calife qui a construit cette bibliothèque, il s'appelait al-Ma'mûn - c'était le fils de Haroun al-Rachid.