The Ben Youssef 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 the Maghreb at its height. The madrasa is named after the adjacent Ben Youssef Mosque built by the Almoravid Sultan Ali ibn Yusuf in the early 12th century and was commissioned by the Saadian Sultan Abdallah al-Ghalib in the 16th century.