Almohad Architecture: Fortifications, Mosques and Building Methods

From the twelfth century to 1269, Almohad rulers commissioned buildings across the western Maghreb and al-Andalus. Their projects included city walls and citadels, mosques, monumental gates, minarets, palaces and gardens. They continued building traditions already established under the Almoravids, while refining construction methods and developing forms that later builders across the region adapted. The surviving evidence also shows change within the period: buildings could be rebuilt, enlarged or reused, and later alterations mean that what remains does not always preserve an Almohad structure in its original form.

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Materials, construction and decoration

Rammed-earth walls were built by packing a damp mixture into wooden formwork and compacting it in successive lifts. Once a section held its shape, the forms could be raised or moved to continue the wall. Brick supplied arches and other structural elements, while stone served foundations or carved façades. Bab Agnaou’s sandstone entrance in Marrakesh made stonecutting part of a royal gateway’s public display.

Material choices varied with a building’s purpose and location. Thick, plain walls gave Tinmal Mosque a fortress-like exterior, while the Kutubiyya’s tall minaret was built in rubble masonry. At Bab Agnaou, stone carving made the entrance a formal display as well as a component of the royal citadel. These examples show that Almohad building was not a single method applied uniformly: builders used different materials and degrees of finish for walls, towers, prayer spaces and ceremonial façades.

Early Almohad architecture generally favoured clear overall forms and proportions over dense surface ornament. Decoration remained important, but builders and designers set carved areas against plainer surfaces, allowing light and shadow to shape their effect. Horseshoe arches were common, while polylobed arches, with several rounded lobes, were used in decorative compositions. Carved stucco, interlacing patterns and muqarnas, a three-dimensional arrangement of small niches, enriched selected areas such as mosque mihrabs and the arches around them. On monumental gates, carved motifs could frame the entrance in repeated bands, making ornament part of the building’s public face.

Fortifications and controlled entrances

Almohad rulers built or rebuilt city walls and smaller forts across their territories. Walls enclosed urban areas, while towers and gates helped defend vulnerable approaches and regulate movement. Some defensive designs extended beyond a simple line of wall. A tower could be set apart from the main circuit and connected to it by an arch higher up, allowing it to project outward from the wall. Other walls ran out from a city enclosure to protect an entrance or a water source, reducing the risk that attackers could cut off access during a siege. Outer defensive barriers, or barbicans, added another layer in front of a wall.

Entrances could also be designed to slow or complicate an approach. A bent entrance forced anyone passing through to turn before reaching the other side, rather than moving straight through a gateway. This arrangement made passage easier to control and exposed an approaching attacker’s flank.

Rabat illustrates how fortification could be tied to a larger urban project. Abd al-Mu’min built much of the Kasbah of the Udayas in 1150–1151. Later, Abu Yusuf Ya’qub al-Mansur began a new capital and citadel project known as Ribat al-Fath. Although the project was not completed, its works formed the outer walls of the historic centre and included major gates such as Bab er-Rouah. In Marrakesh, al-Mansur’s royal kasbah had Bab Agnaou as its main public entrance. Completed around 1188–1190, this gate stood inside the walls of the wider city, so its principal role was ceremonial rather than that of an outer defensive barrier. Its original design nevertheless included flanking towers and a vaulted passage that turned before exiting. Those features have since disappeared or been altered; the present opening does not preserve the original entrance in full.

Defensive building also responded to particular sites. On the Guadalquivir River, Seville’s Torre del Oro, built in 1220–1221, served as a defensive tower beside the river. The Calahorra Tower at Córdoba is thought to have been an Almohad structure intended to defend the river and the city’s old bridge. In both cases, the position of the fortification connected defence to a route of movement through or into the city.

Mosques, prayer spaces and minarets

Many Almohad mosques used a hypostyle plan: a large prayer hall divided by rows of arches supported by columns or piers. Worshippers faced the qibla, the direction of prayer, indicated by the mihrab, a niche in the qibla wall. A common arrangement gave extra width and visual emphasis to the central aisle leading to the mihrab and to an aisle running parallel to the qibla wall. Together, the two wider aisles formed a T shape in the floor plan. Distinctive arches and richer decoration drew attention to this intersection and to the direction of prayer. The arrangement continued a regional tradition established before the Almohad period and became common in later mosques.

A courtyard, or sahn, could occupy one end of the mosque, adjoining the prayer hall. In Tinmal Mosque, the courtyard lay to the north of the hall, whose rows of pointed horseshoe arches divided the interior into nine aisles. The southern aisle alongside the qibla wall and the central aisle leading to the mihrab were made more prominent through their width, arch forms and decoration. Cupolas with muqarnas marked parts of the qibla aisle, including the area in front of the mihrab. The mosque was built on or near an earlier mosque at Tinmal, where the Almohad movement had established a base. Its foundation is associated with Abd al-Mu’min and is usually dated to about 1148, though a historical chronicle gives 1153–1154. Tinmal was smaller than the major mosques in larger cities, but its religious associations and role as a place of burial for later Almohad rulers gave it particular importance within the movement.

The Kutubiyya Mosque in Marrakesh shows how a major religious building could change through successive construction. Abd al-Mu’min founded a first mosque in 1147. A second mosque was built beside it, on its qibla side; the structure standing today belongs to this later building phase, generally dated from around 1158 to before 1195. The two mosques were closely similar in layout and materials, though their orientation differed. The first mosque survives as excavated foundations rather than as a standing building. The precise reasons for constructing the second mosque remain uncertain.

Almohad minarets generally had a square plan and a tall shaft with framed decorative panels. At Seville, the minaret now known as the Giralda was built in 1184–1198. A square central core and outer walls enclosed ascending ramps, giving access to the upper levels. Its present Renaissance bell storey is a later addition. Marrakesh’s Kutubiyya and Rabat’s unfinished Hassan Tower belong to the same broad period of monumental commissions.

The Kutubiyya’s wooden minbar was inherited from the Almoravids. A minbar is the pulpit used for a sermon, particularly at Friday congregational prayer. Moving it into a new mosque brought an older crafted object into a new architectural and political setting. The building and its furnishings therefore had connected but distinct histories.

Palaces, gardens and urban projects

Royal construction extended beyond walls and mosques. Al-Mansur’s kasbah in Marrakesh was a citadel and palace complex intended to house the caliph’s family and administration. Outside major cities, Almohad rulers also maintained estates centred on large reservoirs. The water supported orchards and other plantings, while small palaces or pavilions stood beside the reservoirs. These works combined water storage, cultivation and royal use in a single planned landscape. The present-day Agdal and Menara gardens in Marrakesh developed from Almohad creations; in Seville, the remains of the al-Buḥayra garden, founded in 1171, were excavated.

Walls, gates, mosques, palaces and gardens formed connected parts of urban development. Defensive works enclosed and protected cities; gates shaped access to districts and royal spaces; mosques accommodated worship and expressed the presence of the ruling authorities; and water-fed estates supported cultivation outside the built-up area. Almohad construction drew on earlier regional practices but gave them new scale and organisation. Later builders adapted many of its architectural forms, while rebuilding and restoration changed individual structures over time.

For the wider setting, see The Almohad Caliphate: History, Government and Society.