The Great Mosque of Tlemcen (, el-Jemaa el-Kebir litilimcen) is a major historic mosque in Tlemcen, Algeria. It was founded and first built in 1082 but modified and embellished several times afterwards. It is considered one of the most important examples of architecture under the Almoravid dynasty.
History
The mosque was founded by the Almoravid emir Yusuf ibn Tashfin in 1082 when he founded the city of Tagrart (present-day Tlemcen), an extension of the earlier Idrisid-era city of Agadir. However, the mosque was renovated and decorated by his son and successor, Ali ibn Yusuf. Among other things, the celebrated dome near the mosque's mihrab dates from this renovation, which an inscription below the dome indicates was completed in 1136. Curiously, however, the actual name of the emir has been erased from the inscription, possibly by the Almohads who ruled the city after the Almoravids. It is also believed that the old Almoravid palace of the city, the Qasr al-Qadima or Qasr al-Bali ("Old Palace"), directly adjoined the mosque on its northwestern side.
In 1236 Sultan Yaghmorasan (ruled 1236–1283), the founder of the Abdalwadid dynasty of Tlemcen, added the mosque's minaret near its courtyard. Yaghmorasan also modified the areas around the courtyard and extended the mosque structure northwards. The original mosque likely had a larger rectangular courtyard whose position and proportions would have been similar to the courtyards of earlier mosques in Al-Andalus, whereas Yaghmorasan's modifications left the mosque with a square courtyard whose middle axis is no longer aligned with the middle axis of the mosque. The less ornate dome in the middle of the prayer hall today probably also dates from this time.
Next to the mosque there used to be an Islamic court (Mahkama) and an Islamic university. In 1875, during French colonial control, the mosque was declared, along with other major monuments of the city, a "Historic Monument" and placed under certain protective measures. Around the same time, French architects carried out the first modern repairs, restorations, and studies of the mosque.
Architecture
The floor plan of the mosque is approximately deep. Although the mosque is designed for a typical rectangular floor plan, the northwestern corner of the mosque is truncated because of the original presence of a palace on this side. Like most North African mosques, its has a hypostyle prayer hall and an internal courtyard (sahn). The prayer hall is divided into 13 naves or aisles by 12 rows of horseshoe arches running perpendicular to the southeastern qibla wall. Two transverse rows of arches – one on the south side of the courtyard and another about halfway between the courtyard and the qibla wall – also feature polylobed arches, and another polylobed arch runs transversally before the bay in front of the mihrab (niche symbolizing the direction of prayer). The central aisle in front of the mihrab is wider than the other aisles. At this aisle's middle point, in front of the second row of transverse arches, is an ornamental ribbed dome, likely added by Yaghmorasan in the 13th century. Another ornamental dome, older and more intricate, covers the bay in front of the mihrab. Some of the arch pillars near the mihrab also feature marble columns. The mihrab itself is an alcove in the wall which opens through a horseshoe arch which is framed by intricate carved stucco decoration. The overall design of the mihrab follows the overall architectural precedents seen in the mihrab of the Great Mosque of Cordoba.
The intricate ribbed dome in front of the mihrab is considered a highlight of Almoravid architecture and dates to the renovation of Ali ibn Yusuf. The structure of the dome is strictly ornamental, consisting of multiple ribs or intersecting arches forming a twelve-pointed star pattern. It is also partly see-through, allowing some outside light to filter through a screen of pierced and carved arabesque and openwork decoration that fills the spaces between the ribs.
The original Almoravid mosque presumably had no minaret, as the current minaret was only added in 1236 by Yaghmorasan. The minaret is made of brick and has a typical square floor plan, measuring per side. It has a two-tiered shaft: the main shaft is tall and a secondary lantern tower above this brings the total height to meters. The four facades of the main shaft of the minaret are decorated with carved panels of sebka motifs springing from engaged columns below. An odd detail is the fact that the decorative panel on the courtyard side is uneven: the space between the engaged columns on the left is wider than the others, causing an uneven spacing within the sebka pattern above it as well.