It’s the fact that the building tells the story of over 1500 years. Its roof is held up by a series of double arches made up of its iconic alternating red and white bricks. This is one of the reasons why the mosque, along with Cordoba’s historic center, were declared a UNESCO World Heritage site. In 1994, the original World Heritage property was extended to include not only the Mosque-Cathedral, but also the surrounding area and a number of historic buildings and monuments from Roman, Islamic and Christian times. Added to and altered but never demolished, this architectural hybrid is today a truly unique artistic creation.

The courtyard

The ongoing debates over its religious designation further complicate discussions of heritage management, raising critical questions about architectural authorship and cultural ownership. The Renaissance dome, with its sculptural articulation, directly opposes the mosque’s structural restraint. Each expansion seamlessly extended the existing framework, reinforcing a sense of spatial continuity that was later challenged by the cathedral’s insertion. In 1236, Córdoba fell to King Ferdinand III of Castile, marking the beginning of the mosque’s conversion into a cathedral. Its design drew inspiration from the Great Mosque of Damascus, yet it also incorporated elements of the existing Visigothic structure on the site, reusing columns and capitals in a display of both practicality and symbolic continuity.

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It was originally the gate by which the Muslim emir and his officials entered the mosque and it presumably existed since the mosque's first construction by Abd ar-Rahman I in the 8th century. At the centre of the ensemble on the west side is a large episcopal throne, commissioned in 1752, that resembles the design of an altarpiece. The altar of the Capilla Mayor was begun in 1618 and designed in a Mannerist style by Alonso Matías. On the dome itself, are the images of the eight Fathers of the Church along the outer edge and an image of the Holy Trinity at its center, which together are part of a Counter-Reformist iconographic program. The elliptical dome of the crossing rests on four pendentives which are sculpted with images of the four evangelists.
The most exquisite decoration in the whole complex is found in the third mihrab, or prayer niche, a small octagonal recess roofed with a single block of white marble that is carved in the form of a shell and has walls inlaid with Byzantine-style mosaics and gold. This insertion disrupted the mosque’s expansive horizontality with a centralized vertical thrust characteristic of Christian cathedrals, initiating a dialogue of architectural dissonance that continues to provoke discourse today. The mosque was conceived as a hypostyle prayer hall, a typology emphasizing modular repetition, which allowed for gradual expansion. Defenders of the ecclesial ownership argue on the basis of continuous and peaceful occupation of the building by the Church whereas defenders of the public ownership argue that the mosque-cathedral never ceased to be a State's property, initially belonging to the Crown of Castile (and henceforth the Spanish State). After the mosque's conversion to a cathedral in 1236, Spanish Christian designs were increasingly added to new or existing gates.

• The most significant alteration of all, however, was the building of a Renaissance cathedral nave and transept – forming a new Capilla Mayor es – in the middle of the expansive mosque structure, starting in 1523.
• The mihrab and the maqsurah (1984) by Historic Centre of CordobaUNESCO World Heritage
• The Mihrab is a prayer niche found in mosques and the one found inside the Great Mosque of Cordoba could be the most beautiful in the world.
• In the nave or aisle of the hypostyle hall which leads to the mihrab, at the spot which marks the beginning of Al-Hakam’s 10th-century extension, is a monumental ribbed dome with ornate decoration.
• It challenges the assumption that interventions must be either wholly preservational or entirely transformative.
• The dome is now part of the Villaviciosa Chapel and two of the three intersecting arch screens are still present (the western one has disappeared and been replaced by the 15th-century Gothic nave added to the chapel).

San Rafael triumphal monument

Located next to the altar, the cathedral’s Royal Chapel was completed in 1371. The mihrab and the maqsurah (1984) by Historic Centre of CordobaUNESCO World Heritage Over time, Abd al-Rahman’s successors extended the mosque and enriched it with elements of Andalusian art. The ribbed dome at the entrance Al-Hakam II's 10th-century extension (1984) by Historic Centre of CordobaUNESCO World Heritage Using Roman and Visigoth elements and materials from the site’s previous structures, the mosque was completed in only two years.

• The Mosque-Cathedral of Córdoba is a profound architectural expression of the layered histories of al-Andalus.
• The Puerta de las Palmas (Door of the Palms) is the grand ceremonial gate from the Courtyard of the Oranges to the cathedral’s interior, built on what was originally a uniform façade of open arches leading to the former mosque’s prayer hall.
• The area inside is made up of a forest of columns with a harmonious colour scheme of red and white arches.
• A design by Hernán Ruiz III (son of Hernán Ruiz II) was chosen, encasing the original minaret structure into a new Renaissance-style bell tower.
• It was probably instituted not only to make use of Mudéjar expertise but also to make up for the cathedral chapter’s relative poverty, especially vis-à-vis the monumental task of repairing and maintaining such a large building.
• It is likely that the mosque’s minbar was also restored at this time, since it is known to have survived long afterwards up to the 16th century.

Muslim prayer has not been always banned outright and there are some cases of token concessions in the past, including Saddam Hussein's prayer at the Mihrab in December 1974. The faded mural paintings inside the blind arches above the outer doorway include a depiction of Our Lady of the Assumption in the middle, with Saint Michel and Saint Raphael on the sides. Its current appearance dates from the work of Hernán Ruiz II, who took over work on the cathedral in 1547 after the passing of his father (Hernán Ruiz I). The small Postigo de la Leche ("Door of the Milk") on the west side of the building has Gothic details dating from 1475.

The Soul of Córdoba

Ultimately, the Mosque-Cathedral of Córdoba is more than an architectural landmark; it is a living document of cultural convergence, conflict, and coalescence. How can architects navigate the integration of divergent architectural traditions without diminishing either? The Mosque-Cathedral also prompts reflection on spatial hybridity in modern architectural practice. It challenges the assumption that interventions must be either wholly preservational or entirely transformative. With the Christian conversion, chapels, altars, and choir stalls were embedded within the existing framework. Horseshoe and polylobed arches, adorned with alternating red and white voussoirs, create a dynamic interplay of color and form.
Some remains of the original eastern doors of Al-Hakam II's expansion, before Al-Mansur's displacement of the eastern wall, are still visible inside the mosque-cathedral today. The cathedral's main chapel (known from Spanish as the Capilla Mayor) is located at the cruciform nave and transept at the center of the building. It was designed by architect Hernan Ruiz III (grandson of Hernan Ruiz I), who built the tower up to the bell's level but died before its completion.
He also added a new, richly-decorated mihrab (a niche built into the qibla https://www.velwinscasino.gr/ wall which indicates the direction of prayer) and a large maqsurah (an area that was reserved for rulers during prayers). The first minaret in all of Al-Andalus, it was built in the courtyard of the mosque. On the opposite side of the hall, the naves opened out into an impressive porticoed courtyard, which was also part of the original building and the location for ritual purification prior to prayer. A defining feature of the original mosque is its hypostyle hall, an expansive grid of columns supporting double-tiered horseshoe arches.

The Great Mosque of Cordoba

The flames reached the Chapel of Expectation, and after the firefighters intervened, the roof of this chapel collapsed under the weight of the water. Further restorations of features like chapels and some of the outer gates have continued to take place up to the late 2010s. Further research work and archaeological excavations were carried out on the mosque structure and in the Courtyard of the Oranges by Félix Hernández between 1931 and 1936. Further restoration works concentrating on the former mosque structure were carried out between 1879 and 1923 under the direction of Velázquez Bosco, who among other things dismantled the baroque elements that had been added to the Villaviciosa Chapel and uncovered the earlier structures there. Patricio Furriel was responsible for restoring the mihrab's Islamic mosaics, including the portions which had been lost. In 1727 the tower was damaged by another storm and in 1755 pieces of it (mainly decorative details) were damaged by the 1755 Lisbon Earthquake.

The Capilla Mayor and cruciform cathedral core

The first major addition to the building under Christian patrons is the Royal Chapel (Capilla Real), located directly behind the west wall of the Villaviciosa Chapel. It was probably instituted not only to make use of Mudéjar expertise but also to make up for the cathedral chapter's relative poverty, especially vis-à-vis the monumental task of repairing and maintaining such a large building. Some of them were kept on payroll by the church but many of them worked as part of their fulfilment of a "labor tax" on Muslim craftsmen (later extended to Muslims of all professions) which required them to work two days a year on the cathedral building.
The cathedral chapter eventually won its case by petitioning Charles V, king of Castile and Aragon, who gave his permission for the project to proceed. The Royal Chapel was constructed in a lavish Mudéjar style with a ribbed dome very similar to the neighbouring dome of the Villaviciosa Chapel and with surfaces covered in carved stucco decoration typical of Nasrid architecture at the time. While it is sometimes believed to have been started by Alfonso X, Heather Ecker has argued that documentary evidence proves it wasn't begun before the 14th century when Constance of Portugal, wife of Ferdinand IV, made an endowment for the chapel.