Ali ibn Yusuf
The Ben Youssef Madrasa, north of the Medina, was an Islamic college in Marrakesh named after the Almoravid sultan Ali ibn Yusuf (1106–1142) who expanded the city and its influence considerably. It is the largest madrasa in all of Morocco and was one of the largest theological colleges in North Africa, at one time housing as many as 900 students.