[4] It encompasses a vast courtyard, a hypostyle prayer hall, and a square minaret towering at 25 meters (82 ft) in height.

[8][6] The courtyard, spanning 53.20 by 26.90 meters, is encircled by a portico and paved with white tiles, with a cistern at its center supplied by a spring.

According to Blanchet, the wall dividing the courtyard from the main hall featured vertically pierced pottery pipes for rainwater drainage.

Lastly, archaeologists found thirty-three sections of roughly hewn stone shafts in the courtyard, ranging in diameter from 15 to 42 cm.

[22] At the heart of the mihrab axis, positioned in the center of the northern side of the courtyard, stands the minaret, currently reaching a height of 24.70 meters,[3] albeit with its upper section collapsed.

Its rectangular tower, measuring 6.50 meters on each side, houses a staircase with one hundred and twenty-seven steps, winding around its center and leading to the top.

[1][6] Constructed on a square plan reminiscent of those in Syria, it originally featured ceramic embellishments on its southern façade, while its wooden staircase was later replaced by one made of masonry.

[8] Flanking this central register are blind niches, occasionally embellished with shell motifs, housing mosaic ceramic or cross designs remodeled in stucco at the rear, arranged symmetrically.

[8][22] Destroyed at its summit, it is presumed that the minaret was originally crowned with battlements and a lantern resembling that of the Kutubiyya Mosque in Marrakech.

What sets it apart is its unique arrangement of ornamentation into three vertical registers, a pioneering feature in the history of Islamic art, later echoed in the minaret of the Giralda in Seville.

[8] Archaeologists investigating the origin of its ornamentation discovered that the columns were embellished with delicate Arabic calligraphy, along with fragments and panels featuring Kufic script and remnants of glazed pottery.

The side registers each features a semi-circular basin topped with a dome resembling a shell,[8][19] similar to those seen on Al Manar tower.

[1][8][15] The courtyard was paved with white tiles, while the marble columns, oval-shaped, stood atop reinforced pillars, with four securely anchored into the ground.

[1] Additionally, the wall dividing the courtyard from the main prayer hall, as described by Blanchet, featured vertically positioned pottery pipes for rainwater drainage.

The various excavation endeavors have unearthed a wealth of archaeological treasures, including decorative fragments, columns, basins, ceramics, coins, and jewelry.

[8] Unlike the mosques of Kairouan and Sfax, the minaret of Qal'at Bani Hammad stands opposite the mihrab but differs significantly from them in form, with vertical walls instead of battered ones.

[20] Regarding the one of Mansourah Mosque, constructed by the Merinids in Tlemcen, its facade decorations seem to have been influenced by those of the Qal'at Banu Hammad and the Giralda in Seville.