Fodor's Expert Review Abou el Hassan Merenid Medersa
Turn left around the corner of the Great Mosque, and you'll see on your right the Abou el Hassan Medersa. Built by the Merenid sultan of that name in the 14th century, it's a fine example of the traditional Koranic school. Like the Bou Inania in Fez or the Ben Youssef in Marrakesh, this madrassa has beautiful intricate plasterwork around its central courtyard, and a fine mihrab (prayer niche) with a ceiling carved in an interlocking geometrical pattern representing the cosmos. Upstairs, on the second and third floors, you can visit the little cells where the students used to sleep, and from the roof you can see the entire city.