The Völklingen Ironworks in western Germany close to the border with France cover 6 ha and are a unique monument to pig-iron production in Western Europe. No other historic blast-furnace complex has survived that demonstrates the entire process of pig-iron production in the same way, with the same degree of authenticity and completeness, and is underlined by such a series of technological milestones in innovative engineering. The Völklingen monument illustrates the industrial history of the 19th century in general and also the transnational Saar-Lorraine-Luxembourg industrial region in the heart of Europe in particular. The Ironworks are a synonym for and a symbol of human achievement during the First and Second Industrial Revolutions in the 19th and beginning of the 20th centuries.
The iron-making complex dominates the townscape of Völklingen. It contains installations covering every stage in the pig-iron production process, from raw materials handling and processing equipment for coal and iron ore to blast-furnace iron production, with all the ancillary equipment, such as gas purification and blowing equipment.
The installations are exactly as they were when production ceased in 1986. The overall appearance is that of an ironworks from the 1930s, since no new installations were added after the rebuilding of the coking plant in 1935. There is considerable evidence of the history of the works in the form of individual items that have preserved substantial elements of their original form. Large sections of the frames and platforms of the blast furnaces, for example, have not been altered since their installation at the turn of the 19th to 20th centuries. Much of the original coking plant survives, despite the 1935 reconstruction, notably the coal tower of 1898. Six of the gas-blowing engines, built between 1905 and 1914, are preserved, as are the suspended conveyer system of 1911 and the dry gas purification plant of the same time. In addition, remains of Buch´s puddle ironworks of 1873 are preserved in the power station below the blast furnaces.
Völklingen Ironworks was declared by UNESCO as a World Heritage site in 1994.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.