The Grand Kremlin Palace was built from 1837 to 1849 on the site of the estate of the Grand Princes, which had been established in the 14th century on Borovitsky Hill. Designed by a team of architects under the management of Konstantin Thon, it was intended to emphasise the greatness of Russian autocracy. Konstantin Thon was also the architect of the Kremlin Armoury and the Cathedral of Christ the Savior.
The Grand Kremlin Palace was formerly the tsar's Moscow residence. Its construction involved the demolition of the previous Baroque palace on the site, designed by Rastrelli, and the Church of St. John the Baptist, constructed to a design by Aloisio the New in place of the first church ever built in Moscow.
Thon's palace is 125 metres long, 47 metres high, and has a total area of about 25,000 square metres. It includes the earlier Terem Palace, nine churches from the 14th, 16th, and 17th centuries, the Holy Vestibule, and over 700 rooms. The buildings of the Palace form a rectangle with an inner courtyard. The building appears to be three stories, but is actually two. The upper floor has two sets of windows. The west building of the Palace held state reception halls and the imperial family's private chambers.
Its five reception halls are named for orders of the Russian Empire. Georgievsky Hall is used today for state and diplomatic receptions and official ceremonies. International treaties are signed at the Vladimirsky Hall. Such as the instance on June 1, 1988, U.S. President Ronald Reagan and Soviet General Secretary Mikhail Gorbachev signed the INF Treaty ratification. It also leads to the Palace of Facets, the Tsarina's Golden Chamber, Terem Palace, the Winter Palace, and the Palace of Congresses. Aleksandrovsky Hall and Andreyevsky Hall were combined in Soviet times to be used for meetings and conferences of the Supreme Soviet of the USSR; they were lavishly restored in accordance with Thon's designs in the 1990s.References:
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.