[1] It is entered from the street via a set of wooden doors with decorative copper fittings which leads to a long vestibule passage.

[1][3] The ablutions house (Dar al-Wudu) consists of another courtyard surrounded by 22 changing rooms or latrines and centered around a large rectangular water basin.

[3][1] On the courtyard's southeastern side is a large chamber, entered via an ornate archway with muqarnas, which served as the madrasa's mosque or prayer hall.

In the middle of its southeastern wall is a mihrab (niche symbolizing the direction of prayer) which is surrounded by intricately-carved stucco decoration with arabesque and geometric motifs as well as Arabic inscriptions.

[1] French scholar George Marçais, in his major work on Islamic architecture in the region, noted that the Bu Inania Madrasa of Meknes represented a kind of architectural transition between the madrasas built by Abu al-Hasan and the ones built by his son Abu Inan.