Ali ibn Yusuf
The Ben Youssef Madrasa (; also transliterated as Bin Yusuf or Ibn Yusuf Madrasa) is an Islamic madrasa (college) in Marrakesh, Morocco. Functioning today as a historical site, the Ben Youssef Madrasa was the largest Islamic college in Morocco at its height. The madrasa is named after the adjacent Ben Youssef Mosque founded by the Almoravid Sultan Ali ibn Yusuf (reigned 1106-1142). The madrasa building which stands today was commissioned by the Sa'di (or Saadian) Sultan Abdallah al-Ghalib, following a style established during the earlier Marinid period.