The Ben Youssef Madrasa, located to the north of the Medina, was an Islamic college in Marrakech, named after the Almoravid sultan Ali ibn Yusuf (reigned 1106–1142), who expanded the city and its influence considerably. It is the largest Medrasa in all of Morocco and was one of the largest theological colleges in North Africa and may have housed as many as 900 students.[115]