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Pendentive
In architecture, a pendentive is a constructional device permitting the placing of a circular dome over a square room or of an elliptical dome over a rectangular room. The pendentives, which are triangular segments of a sphere, taper to points at the bottom and spread at the top to establish the continuous circular or elliptical base needed for a dome. In masonry the pendentives thus receive the weight of the dome, concentrating it at the four corners where it can be received by the piers beneath. Prior to the pendentive's development, builders used the device of corbelling or squinches in the corners of a room. Pendentives commonly occurred in Orthodox, Renaissance, and Baroque churches, with a drum with windows often inserted between the pendentives and the dome. The first experimentation with pendentives began with Roman dome construction in the 2nd–3rd century AD, while full development of the form came in the 6th-century Eastern Roman Hagia Sophia at Constanti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dome
A dome () is an architectural element similar to the hollow upper half of a sphere. There is significant overlap with the term cupola, which may also refer to a dome or a structure on top of a dome. The precise definition of a dome has been a matter of controversy and there are a wide variety of forms and specialized terms to describe them. A dome can rest directly upon a rotunda wall, a drum, or a system of squinches or pendentives used to accommodate the transition in shape from a rectangular or square space to the round or polygonal base of the dome. The dome's apex may be closed or may be open in the form of an oculus, which may itself be covered with a roof lantern and cupola. Domes have a long architectural lineage that extends back into prehistory. Domes were built in ancient Mesopotamia, and they have been found in Persian, Hellenistic, Roman, and Chinese architecture in the ancient world, as well as among a number of indigenous building traditions throughout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hagia Sophia
Hagia Sophia ( 'Holy Wisdom'; ; ; ), officially the Hagia Sophia Grand Mosque ( tr, Ayasofya-i Kebir Cami-i Şerifi), is a mosque and major cultural and historical site in Istanbul, Turkey. The cathedral was originally built as a Greek Orthodox Church, Greek Orthodox church which lasted from 360 AD until the Fall of Constantinople, conquest of Constantinople by the Ottoman Empire in 1453. It served as a mosque until 1935, when it became a museum. In 2020, the site once again became a mosque. The current structure was built by the eastern Roman emperor Justinian I as the Christian cathedral of Constantinople for the state church of the Roman Empire between 532 and 537, and was designed by the Greeks, Greek geometers Isidore of Miletus and Anthemius of Tralles. It was formally called the Church of the Holy Wisdom () and upon completion became the world's largest interior space and among History of Roman and Byzantine domes, the first to employ a fully pendentive dome. It is co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Italian Renaissance Domes
Italian Renaissance domes were designed during the Renaissance period of the fifteenth and sixteenth centuries in Italy. Beginning in Florence, the style spread to Rome and Venice and made the combination of dome, drum, and barrel vaults standard structural forms. Notable architects during the Italian Renaissance were Filippo Brunelleschi, builder of the dome of Florence Cathedral, Donato Bramante, Andrea Palladio, and Michelangelo, designer of the dome of St. Peter's Basilica. Fifteenth century Florence Cathedral After years of considering options, Filippo Brunelleschi and Lorenzo Ghiberti were made joint leaders of the project to build the dome for Florence Cathedral in 1420. Brunelleschi's plan to use suspended scaffolding for the workers won out over alternatives such as building a provisional stone support column in the center of the crossing or filling the space with earth. The octagonal brick domical vault was built between 1420 and 1436, with Ghiberti resigning in 143 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Roman Domes
This is a list of Roman domes. The Romans were the first builders in the history of architecture to realize the potential of domes for the creation of large and well-defined interior spaces. Domes were introduced in a number of Roman building types such as temples, thermae, palaces, mausolea and later also churches. Semi-domes also became a favoured architectural element and were adopted as apses in Christian church architecture. Monumental domes began to appear in the 1st century BC in Rome and the provinces around the Mediterranean Sea. Along with vaults and trusses, they gradually replaced the traditional post and lintel construction which makes use of the column and architrave. The construction of domes was greatly facilitated by the invention of concrete, a process which has been termed the Roman Architectural Revolution. Their enormous dimensions remained unsurpassed until the introduction of structural steel frames in the late 19th century (see List of largest d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tholobate
In architecture, a tholobate (from el, θολοβάτης, tholobates, dome pedestal) or drum is the upright part of a building on which a dome is raised. It is generally in the shape of a cylinder or a polygonal prism. In the earlier Byzantine churches, the dome rested directly on the pendentives and the windows were pierced in the dome itself; in later examples, between the pendentive and the dome an intervening circular wall was built in which the windows were pierced. This is the type which was universally employed by the architects of the Renaissance, of whose works the best-known example is St. Peter's Basilica at Rome. Other examples of churches of this type are St Paul's Cathedral in London and the churches of the Les Invalides, the Val-de-Grâce, and the Sorbonne in Paris. There are also secular buildings with tholobates: the United States Capitol dome in Washington, D.C. is set on a drum, as are numerous American state capitols. The Panthéon in Paris is another ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Giovanni Evangelista, Parma
San Giovanni Evangelista is a church in Parma, northern Italy, part of a complex also including a Benedictine convent and grocery. History Works for the abbey and church were started in the 10th century over a pre-existing oratory associated with St. Colombanus. In 1477 the whole complex was damaged by a fire. The abbey basilica was rebuilt from around 1490, with the present design by Bernardino Zaccagni dating from 1510. The construction ended around 1519. The design included since the beginning a thoroughly painting decoration of the interior, and a contract had been signed with the young Correggio, who a had already worked in another Benedictine monastery, in the Camera della Badessa of San Paolo. Correggio executed five frescoes groups. The first includes the lunette with ''St. John and the Eagle'' (c. 1520), followed by the dome, with the ''Ascension of Christ'' and the drum and the four pendentives decoration. The third work was the decoration of the vault and the apse cei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byzantine Empire
The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinople. It survived the fragmentation and fall of the Western Roman Empire in the 5th century AD and continued to exist for an additional thousand years until the fall of Constantinople to the Ottoman Empire in 1453. During most of its existence, the empire remained the most powerful economic, cultural, and military force in Europe. The terms "Byzantine Empire" and "Eastern Roman Empire" were coined after the end of the realm; its citizens continued to refer to their empire as the Roman Empire, and to themselves as Romans—a term which Greeks continued to use for themselves into Ottoman times. Although the Roman state continued and its traditions were maintained, modern historians prefer to differentiate the Byzantine Empire from Ancient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spandrel
A spandrel is a roughly triangular space, usually found in pairs, between the top of an arch and a rectangular frame; between the tops of two adjacent arches or one of the four spaces between a circle within a square. They are frequently filled with decorative elements. Meaning There are four or five accepted and cognate meanings of the term ''spandrel'' in architectural and art history, mostly relating to the space between a curved figure and a rectangular boundary – such as the space between the curve of an arch and a rectilinear bounding moulding, or the wallspace bounded by adjacent arches in an arcade and the stringcourse or moulding above them, or the space between the central medallion of a carpet and its rectangular corners, or the space between the circular face of a clock and the corners of the square revealed by its hood. Also included is the space under a flight of stairs, if it is not occupied by another flight of stairs. In a building with more than one floor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squinch
In architecture, a squinch is a triangular corner that supports the base of a dome. Its visual purpose is to translate a rectangle into an octagon. See also: pendentive. Construction A squinch is typically formed by a masonry arch that spans a square corner. History in the Middle East The dome chamber in the Palace of Ardashir, the Sassanid king, in Firuzabad, Iran is the earliest surviving example of the use of the squinch, suggesting that the squinch may have been invented in Persia. After the rise of Islam, it was used in the Middle East in both eastern Romanesque and Islamic architecture. It remained a feature of Islamic architecture, especially in Iran, and was often covered by corbelled stalactite-like structures known as muqarnas. History in Western Europe It spread to the Romanesque architecture of western Europe, one example being the Normans' 12th-century church of San Cataldo, Palermo in Sicily. This has three domes, each supported by four doubled squinch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Orthodox Church Architecture
Eastern Orthodox church architecture constitutes a distinct, recognizable family of styles among church architectures. These styles share a cluster of fundamental similarities, having been influenced by the common legacy of Byzantine architecture from the Eastern Roman Empire. Some of the styles have become associated with the particular traditions of one specific autocephalous Orthodox patriarchate, whereas others are more widely used within the Eastern Orthodox Church. These architectural styles have held substantial influence over cultures outside Eastern Orthodoxy; particularly in the architecture of Islamic mosques, but also to some degree in Western churches. History While sharing many traditions, Eastern Christianity and Western Christianity began to diverge from each other from an early date. Whereas the basilica, a long aisled hall with an apse at one end, was the most common form in the West, a more compact centralised style became predominant in the East. These chu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugène Viollet-le-Duc
Eugène Emmanuel Viollet-le-Duc (; 27 January 181417 September 1879) was a French architect and author who restored many prominent medieval landmarks in France, including those which had been damaged or abandoned during the French Revolution. His major restoration projects included Notre-Dame de Paris, the Basilica of Saint Denis, Mont Saint-Michel, Sainte-Chapelle, and the medieval walls of the city of Carcassonne, and he planned much of the physical construction of the Statue of Liberty (''Liberty Enlightening the World''). His later writings on the relationship between form and function in architecture had a notable influence on a new generation of architects, including Victor Horta, Hector Guimard, Antoni Gaudí, Hendrik Petrus Berlage, Louis Sullivan and Frank Lloyd Wright. Youth and education Viollet-le-Duc was born in Paris in 1814, in the last year of the Empire of Napoleon Bonaparte. His grandfather was an architect, and his father was a high-ranking civil servan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elliptical Dome
An elliptical dome, or an ''oval dome'', is a dome whose bottom cross-section takes the form of an ellipse. Technically, an ''ellipsoidal dome'' has a circular cross-section, so is not quite the same. While the cupola can take different geometries, when the ceiling's cross-section takes the form of an ellipse, and due to the reflecting properties of an ellipse, any two persons standing at a focus of the floor's ellipse can have one whisper, and the other hears; this is a whispering gallery. The largest elliptical dome in the world is at the Sanctuary of Vicoforte in Vicoforte, Italy. In architecture Elliptical domes have many applications in architecture; and are useful in covering rectangular spaces. The oblate, or horizontal elliptical dome is useful when there is a need to limit height of the space that would result from a spherical dome. As the mathematical description of an elliptical dome is more complex than that of spherical dome, design care is needed. In a ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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