A discharging arch or relieving arch is an arch built over a lintel or architrave to take off the superincumbent weight.

History

The earliest example is found in the

Great Pyramid The Great Pyramid of Giza is the biggest Egyptian pyramid and the tomb of Fourth Dynasty pharaoh Khufu. Built in the early 26th century BC during a period of around 27 years, the pyramid is the oldest of the Seven Wonders of the Ancient World ...

, over the lintels of the entrance passage to the tomb: it consisted of two stones only, resting one against the other. The same object was attained in the

Lion Gate Lion Gate ( el, Πύλη των Λεόντων) is the popular modern name for the main entrance of the Bronze Age citadel of Mycenae in southern Greece. It was erected during the thirteenth century BC, around 1250 BC, in the northwestern side o ...

and the

Treasury of Atreus The Treasury of Atreus or Tomb of Agamemnon is a large ''tholos'' or beehive tomb constructed between 1350 and 1250 BC in Mycenae, Greece.Wace, A. J. (1940). The Treasury of Atreus. ''Antiquity, 14'', 233. ISSN 0003-598X The tomb was used for an un ...

, both in

Mycenae Mycenae ( ; grc, Μυκῆναι or , ''Mykē̂nai'' or ''Mykḗnē'') is an archaeological site near Mykines in Argolis, north-eastern Peloponnese, Greece. It is located about south-west of Athens; north of Argos; and south of Corinth. ...

, and in other examples in

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...

, where the stones laid in horizontal courses, one projecting over the other, left a triangular hollow space above the lintel of the door, which was subsequently filled in by vertical sculptured stone panels. The

Romans Roman or Romans most often refers to: *Rome, the capital city of Italy * Ancient Rome, Roman civilization from 8th century BC to 5th century AD *Roman people, the people of ancient Rome *''Epistle to the Romans'', shortened to ''Romans'', a lette ...

frequently employed the discharging arch, and inside the portico of the

Pantheon Pantheon may refer to: * Pantheon (religion), a set of gods belonging to a particular religion or tradition, and a temple or sacred building Arts and entertainment Comics *Pantheon (Marvel Comics), a fictional organization * ''Pantheon'' (Lone S ...

the architraves have such arches over them. In the Golden Gateway of the

palace of Diocletian Diocletian's Palace ( hr, Dioklecijanova palača, ) is an ancient palace built for the Roman emperor Diocletian at the turn of the fourth century AD, which today forms about half the old town of Split, Croatia. While it is referred to as a "pala ...

Split Split(s) or The Split may refer to: Places * Split, Croatia, the largest coastal city in Croatia * Split Island, Canada, an island in the Hudson Bay * Split Island, Falkland Islands * Split Island, Fiji, better known as Hạfliua Arts, entertai ...

the discharging arches, semicircular in form, were adopted as architectural features and decorated with mouldings. The same is found in the

synagogue A synagogue, ', 'house of assembly', or ', "house of prayer"; Yiddish: ''shul'', Ladino: or ' (from synagogue); or ', "community". sometimes referred to as shul, and interchangeably used with the word temple, is a Jewish house of worshi ...

s in Palestine of the 2nd century; and later, in Byzantine architecture, these moulded

archivolt An archivolt (or voussure) is an ornamental moulding or band following the curve on the underside of an arch. It is composed of bands of ornamental mouldings (or other architectural elements) surrounding an arched opening, corresponding to the ...

s above an architrave constitute one of the characteristics of the style. In the early Christian churches in Rome, where a

colonnade In classical architecture, a colonnade is a long sequence of columns joined by their entablature, often free-standing, or part of a building. Paired or multiple pairs of columns are normally employed in a colonnade which can be straight or cur ...

divided off the

nave The nave () is the central part of a church, stretching from the (normally western) main entrance or rear wall, to the transepts, or in a church without transepts, to the chancel. When a church contains side aisles, as in a basilica-type ...

and aisles, discharging arches are turned in the

frieze In architecture, the frieze is the wide central section part of an entablature and may be plain in the Ionic or Doric order, or decorated with bas-reliefs. Paterae are also usually used to decorate friezes. Even when neither columns nor ...

just above the architraves.

Gallery

Image:Pantheon.drawing.jpg, Cross section of the Pantheon showing the discharging arch on the right side Image:Relieving Arch.jpg, Example of relieving arch at

Greenknowe Tower Greenknowe Tower is a 16th-century tower house, located just west of the village of Gordon, in the Scottish Borders. Although a roofless ruin, the stonework of the tower is well preserved, and represents a fine example of a later tower house, bu ...

Image:Clos_luce_05.jpg, Discharging arch above fireplace in the chamber of

Leonardo da Vinci Leonardo di ser Piero da Vinci (15 April 14522 May 1519) was an Italian polymath of the High Renaissance who was active as a painter, Drawing, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially res ...

at the Château du Clos Lucé

History

Gallery

Notes

References

Further reading