architecture Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and construction, constructi ...

, a pendentive is a constructional device permitting the placing of a circular

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 m ...

over a square room or of an elliptical dome over a rectangular room. The pendentives, which are triangular segments of a

sphere A sphere (from Ancient Greek, Greek , ) is a surface (mathematics), surface analogous to the circle, a curve. In solid geometry, a sphere is the Locus (mathematics), set of points that are all at the same distance from a given point in three ...

, 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

corbel In architecture, a corbel is a structural piece of stone, wood or metal keyed into and projecting from a wall to carry a wikt:superincumbent, bearing weight, a type of bracket (architecture), bracket. A corbel is a solid piece of material in t ...

ling or

squinch In architecture, a squinch is a structural element used to support the base of a circular or octagonal dome that surmounts a square-plan chamber. Squinches are placed to diagonally span each of the upper internal corners ( vertices) where the w ...

es in the corners of a room. Pendentives commonly occurred in Orthodox,

Renaissance The Renaissance ( , ) is a Periodization, period of history and a European cultural movement covering the 15th and 16th centuries. It marked the transition from the Middle Ages to modernity and was characterized by an effort to revive and sur ...

, and

Baroque The Baroque ( , , ) is a Western Style (visual arts), style of Baroque architecture, architecture, Baroque music, music, Baroque dance, dance, Baroque painting, painting, Baroque sculpture, sculpture, poetry, and other arts that flourished from ...

churches, with a

drum The drum is a member of the percussion group of musical instruments. In the Hornbostel–Sachs classification system, it is a membranophone. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a ...

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 cathedral,

Hagia Sophia Hagia Sophia (; ; ; ; ), officially the Hagia Sophia Grand Mosque (; ), is a mosque and former Church (building), church serving as a major cultural and historical site in Istanbul, Turkey. The last of three church buildings to be successively ...

, in

Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...

(Istanbul).

Gallery

File:Pendentif.eglise.Nantua.png, A pendentive, labelled A. Illustration of a church in Nantua File:Schema.pendentif.medieval.png, Formation of a pendentive by

Eugène Viollet-le-Duc Eugène Emmanuel Viollet-le-Duc (; 27 January 181417 September 1879) was a French architect and author, famous for his restoration of the most prominent medieval landmarks in France. His major restoration projects included Notre-Dame de Paris, ...

, 1856 File:Pendentives.jpg, Pendentive structure Hagia Sophia interior - Istanbul, Turkey - panoramio.jpg, Dome of the

, Constantinople/Istanbul File:San_Giovanni_Evangelista_(Parma)_-_Dome.jpg, '' Vision of St. John on Patmos'' by

Correggio Antonio Allegri da Correggio (August 1489 – 5 March 1534), usually known as just Correggio (, also , , ), was an Italian Renaissance painter who was the foremost painter of the Parma school of the High Renaissance, who was responsible for som ...

(1520–1522), San Giovanni Evangelista, Parma File:Çamlıca Mosque, Istanbul Interiror.jpg, The attributes of

Allah Allah ( ; , ) is an Arabic term for God, specifically the God in Abrahamic religions, God of Abraham. Outside of the Middle East, it is principally associated with God in Islam, Islam (in which it is also considered the proper name), althoug ...

(God) in intrinsic

Islamic calligraphy Islamic calligraphy is the artistic practice of penmanship and calligraphy, in the languages which use Arabic alphabet or the Arabic script#Additional letters used in other languages, alphabets derived from it. It is a highly stylized and struc ...

on the pendentives of Çamlıca Mosque,

Istanbul Istanbul is the List of largest cities and towns in Turkey, largest city in Turkey, constituting the country's economic, cultural, and historical heart. With Demographics of Istanbul, a population over , it is home to 18% of the Demographics ...

, opened in 2019

References

Sources

* * Arches and vaults {{architecturalelement-stub

Gallery

See also

References

Sources