The madrasa is actually a complex of buildings that together provide the facilities required to serve as a madrasa and mosque. The main building has the outline of an irregular rectangle measuring 34.65 by 38.95 metres. Right next to this is the
Dar al-Magana or "House of the Clock", which features a famous but currently non-functional hydraulic clock on its facade.
Entrances The madrasa has two entrances: one on Tala'a Kebira street aligned with the
mihrab and the central axis of the building, and another on Tala'a Seghira at the back. The Tala'a Kebira entrance has a horseshoe arch doorway surrounded by
stucco decoration. A set of stairs leads into a vestibule and then directly into the main courtyard. The vestibule is covered in the same rich ornamentation as the rest of the madrasa and has a ceiling of cedar wood carved in elaborate
muqarnas. The canal likely also served an aesthetic and possibly symbolic purpose, in addition to further assisting in ablutions. and the madrasa of
Chellah, runs above this along most of the courtyard. The middle and upper walls above this are covered in finely carved stucco with a harmonious variety of motifs including
arabesques,
muqarnas (especially around the windows and in the archways leading to the side chambers),
Arabic calligraphic inscriptions (particularly at the middle of pillars and around the eastern and western doorways), and more geometric patterns. The spaces between the pillars of the gallery and below the windows are highlighted with carved cedar wood elements, while the walls above the stucco decoration also transition to surfaces of cedar wood carved with more arabesque motifs and Arabic inscriptions. Lastly, the top of the walls is overshadows by a wooden canopy supported by corbels. Both the prayer hall and the lateral study rooms off the main courtyard feature more stucco decoration along their upper walls, as well as windows with coloured glass set into stucco grilles. The mihrab of the prayer hall is itself also richly decorated with carved stucco, as is common to other Moroccan mosques. The cedar wood doors to the lateral chambers on the northeast and southwest sides of the courtyard are also finely carved, featuring bands of Arabic calligraphy and mostly covered with an with interlacing geometric star pattern with arabesque fillings. File:Abu 'Inaniya.jpg|
Zellij tilework featuring
geometric motifs (below), with
sgraffito-type tiles (middle) and
stucco decoration (above) featuring
Arabic calligraphy File:Fez (6112172867).jpg|
Stucco carving, including
muqarnas, along the walls and arches of the courtyard File:Madrasa Bou Inania detail (3044837557).jpg|Carved geometric and arabesque details in the cedar wood doors of the lateral chambers off the courtyard File:Bou Inania Madrasa, Fez, Marocco (المدرسة البوعنانية, ⴰⵙⵉⵏⴰⵏ ⴱⵓ ⵉⵏⴰⵏⵉⵢⴰ).jpg|
Muqarnas sculpting in the
intrados of the archway at the entrance of the lateral chambers File:Medersa Bou Inania (religious school) (2480668634).jpg|Coloured glass windows above in the prayer hall, with stucco grilles and surrounding stucco decoration == Adjacent structures ==