The Citadelle of Quebec is an active military installation and official residence of both the Canadian monarch and the Governor General of Canada. It is located atop Cap Diamant, adjoining the Plains of Abraham in Quebec City. The citadel is the oldest military building in Canada, and forms part of the fortifications of Quebec City, which is one of only two cities in North America still surrounded by fortifications, the other being Campeche, Mexico.
The first fortifications in Quebec were built by the Governor General of New France Louis de Buade, and completed just in time for the Battle of Quebec in 1690.
After the British conquest in the second half of the 18th century, the problem of Quebec City's defences grew more acute. Fears of a potential French attempt to recapture the colony, concerns about a possible uprising by the local French population and war with the Americans forced the British to develop a new defensive strategy for the city. Between 1778 and 1783, during the American War of Independence, wooden redoubts and earthworks were constructed on Cap Diamant. The Citadel was not necessarily meant to be the central element in Quebec City's defences, but was designed to play more of a supporting role while at the same time serving as the corner stone of the system.
Having narrowly repelled the American invasion of Canada during the War of 1812, the British decided to re-examine their defensive strategy. The current fortress was constructed from 1820 to 1832.
Soldiers of the British garrison did the lion's share of the construction work. The Citadel, which was also designed to serve as a barracks and arms depot, could house between 1,000 and 1,500 soldiers and their equipment. It was rare, however, for the full complement of troops to be stationed there. In mid-19th century Quebec City, the British garrison was split between the Citadel, the Jesuit Barracks (where City Hall stands today), and Artillery Park.
The Citadel's role has evolved over time and although it was never tested in battle, it has been continuously occupied by the military throughout its history. In the years following its completion, changes were made to the defensive system in Quebec City and the surrounding area. For example, the guns on the bastions were replaced by more modern artillery. Tensions during the American Civil War (1861-1865) spurred British authorities to strengthen the city's defences further. Between 1865 and 1871, three forts (including Fort No.1 in Lauzon) were built on the Lévis heights on the south shore to provide support for the Citadel.
Today the Citadelle remains an active garrison and since 1920 is home to the Royal 22e Régiment, the Canadian Forces' sole French-language regular force infantry regiment. The Citadelle is a National Historic Site of Canada. The site receives some 200,000 visitors annually.
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.