The Mosque–Cathedral of Córdoba, also known as the Great Mosque of Córdoba and the Mezquita is regarded as one of the most accomplished monuments of Moorish architecture.
According to a traditional account, a small Visigoth church, the Catholic Basilica of Saint Vincent of Lérins, originally stood on the site. In 784 Abd al-Rahman I ordered construction of the Great Mosque, which was considerably expanded by later Muslim rulers. The mosque underwent numerous subsequent changes: Abd al-Rahman II ordered a new minaret, while in 961 Al-Hakam II enlarged the building and enriched the Mihrab. The last of such reforms was carried out by Almanzor in 987. It was connected to the Caliph's palace by a raised walkway, mosques within the palaces being the tradition for previous Islamic rulers – as well as Christian Kings who built their palaces adjacent to churches. The Mezquita reached its current dimensions in 987 with the completion of the outer naves and courtyard.
In 1236, Córdoba was conquered by King Ferdinand III of Castile, and the centre of the mosque was converted into a Catholic cathedral. Alfonso X oversaw the construction of the Villaviciosa Chapel and the Royal Chapel within the mosque. The kings who followed added further Christian features, such as King Henry II rebuilding the chapel in the 14th century. The minaret of the mosque was also converted to the bell tower of the cathedral. It was adorned with Santiago de Compostela's captured cathedral bells. Following a windstorm in 1589, the former minaret was further reinforced by encasing it within a new structure.
The most significant alteration was the building of a Renaissance cathedral nave in the middle of the expansive structure. The insertion was constructed by permission of Charles V, king of Castile and Aragon. Artisans and architects continued to add to the existing structure until the late 18th century.
The building's floor plan is seen to be parallel to some of the earliest mosques built from the very beginning of Islam. It had a rectangular prayer hall with aisles arranged perpendicular to the qibla, the direction towards which Muslims pray. The prayer hall was large and flat, with timber ceilings held up by arches of horseshoe-like appearance.
In planning the mosque, the architects incorporated a number of Roman columns with choice capitals. Some of the columns were already in the Gothic structure; others were sent from various regions of Iberia as presents from the governors of provinces. Ivory, jasper, porphyry, gold, silver, copper, and brass were used in the decorations. Marvellous mosaics and azulejos were designed. Later, the immense temple embodied all the styles of Morisco architecture into one composition.
The building is most notable for its arcaded hypostyle hall, with 856 columns of jasper, onyx, marble, granite and porphyry. These were made from pieces of the Roman temple that had occupied the site previously, as well as other Roman buildings, such as the Mérida amphitheatre. The double arches were an innovation, permitting higher ceilings than would otherwise be possible with relatively low columns. The double arches consist of a lower horseshoe arch and an upper semi-circular arch.References:
The Great Mosque of Cordoba is an other example the form never follows function at all times. The form was used as Mosque and as Catholic church at different times in the life of the structure, just like Haggia Sophia of Turkey. Ornament essentially defines the character of a form to define the function.
The Trinity Lavra of St. Sergius is a world famous spiritual centre of the Russian Orthodox Church and a popular site of pilgrimage and tourism. It is the most important working Russian monastery and a residence of the Patriarch. This religious and military complex represents an epitome of the growth of Russian architecture and contains some of that architecture’s finest expressions. It exerted a profound influence on architecture in Russia and other parts of Eastern Europe.
The Trinity Lavra of St. Sergius, was founded in 1337 by the monk Sergius of Radonezh. Sergius achieved great prestige as the spiritual adviser of Dmitri Donskoi, Great Prince of Moscow, who received his blessing to the battle of Kulikov of 1380. The monastery started as a little wooden church on Makovets Hill, and then developed and grew stronger through the ages.
Over the centuries a unique ensemble of more than 50 buildings and constructions of different dates were established. The whole complex was erected according to the architectural concept of the main church, the Trinity Cathedral (1422), where the relics of St. Sergius may be seen.
In 1476 Pskovian masters built a brick belfry east of the cathedral dedicated to the Descent of the Holy Spirit on the Apostles. The church combines unique features of early Muscovite and Pskovian architecture. A remarkable feature of this church is a bell tower under its dome without internal interconnection between the belfry and the cathedral itself.
The Cathedral of the Assumption, echoing the Cathedral of the Assumption in the Moscow Kremlin, was erected between 1559 and 1585. The frescoes of the Assumption Cathedral were painted in 1684. At the north-western corner of the Cathedral, on the site of the western porch, in 1780 a vault containing burials of Tsar Boris Godunov and his family was built.
In the 16th century the monastery was surrounded by 6 meters high and 3,5 meters thick defensive walls, which proved their worth during the 16-month siege by Polish-Lithuanian invaders during the Time of Trouble. They were later strengthened and expanded.
After the Upheaval of the 17th century a large-scale building programme was launched. At this time new buildings were erected in the north-western part of the monastery, including infirmaries topped with a tented church dedicated to Saints Zosima and Sawatiy of Solovki (1635-1637). Few such churches are still preserved, so this tented church with a unique tiled roof is an important contribution to the Lavra.
In the late 17th century a number of new buildings in Naryshkin (Moscow) Baroque style were added to the monastery.
Following a devastating fire in 1746, when most of the wooden buildings and structures were destroyed, a major reconstruction campaign was launched, during which the appearance of many of the buildings was changed to a more monumental style. At this time one of the tallest Russian belfries (88 meters high) was built.
In the late 18th century, when many church lands were secularized, the chaotic planning of the settlements and suburbs around the monastery was replaced by a regular layout of the streets and quarters. The town of Sergiev Posad was surrounded by traditional ramparts and walls. In the vicinity of the monastery a number of buildings belonging to it were erected: a stable yard, hotels, a hospice, a poorhouse, as well as guest and merchant houses. Major highways leading to the monastery were straightened and marked by establishing entry squares, the overall urban development being oriented towards the centrepiece - the Ensemble of the Trinity Sergius Lavra.
In 1993, the Trinity Lavra was inscribed on the UNESCO World Heritage List.