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What (who) is Intrados - definition
VERTICAL CURVED STRUCTURE THAT SPANS A SPACE AND MAY OR MAY NOT SUPPORT A LOAD
Arched; Three-centred arch; Arching; Coussinet; Intrados; Key stone; Arcuated; Compression arch; Round arch; Arches; Types of arches; Depressed arch; Inflexed arch; Three-pinned arch; Three-hinged arch; Arch structure; Three-centered arch
![[[Horseshoe arch]]es in the 9th-century [[Mosque of Uqba]], in [[Kairouan]], Tunisia](https://commons.wikimedia.org/wiki/Special:FilePath/Arches and columns, Great Mosque of Kairouan.jpg?width=200 "[[Horseshoe arch]]es in the 9th-century [[Mosque of Uqba]], in [[Kairouan]], Tunisia")
![Deformed arch at the [[Gozo Aqueduct]], Malta](https://commons.wikimedia.org/wiki/Special:FilePath/Gozo fortified tower, windmills, aqueduct 16.jpg?width=200 "Deformed arch at the [[Gozo Aqueduct]], Malta")
![Semi-circular arches using [[brick]] and/or [[stone]] block construction at the [[Great Wall]], China](https://commons.wikimedia.org/wiki/Special:FilePath/InsideGWWatchtower.jpg?width=200 "Semi-circular arches using [[brick]] and/or [[stone]] block construction at the [[Great Wall]], China")
![ribs]] at the intersection of several arches](https://commons.wikimedia.org/wiki/Special:FilePath/Notre-dame-de-paris-vue-interieure-salle-nord.jpg?width=200 "ribs]] at the intersection of several arches")
![A series of parabolic arches on the [[Móra d'Ebre]] bridge, [[Catalonia]], Spain (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Pont d'arcades de Móra d'Ebre (Ribera d'Ebre, Catalonia).jpg?width=200 "A series of parabolic arches on the [[Móra d'Ebre]] bridge, [[Catalonia]], Spain (2005)")
![arcade]], employing the circular arch](https://commons.wikimedia.org/wiki/Special:FilePath/Pont du Gard - panoramio (11).jpg?width=200 "arcade]], employing the circular arch")
![Arch of Caracalla]], a Roman triumphal arch in [[Tébessa]], Algeria (2016)](https://commons.wikimedia.org/wiki/Special:FilePath/Porte Caracalla - Tébessa باب كركلا - تبسة 3.jpg?width=200 "Arch of Caracalla]], a Roman triumphal arch in [[Tébessa]], Algeria (2016)")
![hinge]] at mid-span of this three-hinged arch.](https://commons.wikimedia.org/wiki/Special:FilePath/Rossgrabenbruecke 01 09.jpg?width=200 "hinge]] at mid-span of this three-hinged arch.")
![[[Cathedral of St. Michael and St. Gudula]] in [[Brussels]], [[Belgium]], with a central [[pointed arch]] window, typical of [[Gothic architecture]]](https://commons.wikimedia.org/wiki/Special:FilePath/SteGudule.jpg?width=200 "[[Cathedral of St. Michael and St. Gudula]] in [[Brussels]], [[Belgium]], with a central [[pointed arch]] window, typical of [[Gothic architecture]]")
![[[Tyne Bridge]] in [[Newcastle upon Tyne]], [[England]]: a parabolic arch](https://commons.wikimedia.org/wiki/Special:FilePath/Tyne Bridge - Newcastle Upon Tyne - England - 2004-08-14.jpg?width=200 "[[Tyne Bridge]] in [[Newcastle upon Tyne]], [[England]]: a parabolic arch")
![[[Segmental arch]] (less than a semicircle)](https://commons.wikimedia.org/wiki/Special:FilePath/Segmentbåge.png?width=200 "[[Segmental arch]] (less than a semicircle)")
![[[Lancet arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Lansettbåge.png?width=200 "[[Lancet arch]]")
![Equilateral arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Spetsbåge.png?width=200 "Equilateral arch]]")
![Shouldered flat arch (see also [[jack arch]])](https://commons.wikimedia.org/wiki/Special:FilePath/Skulderbåge.png?width=200 "Shouldered flat arch (see also [[jack arch]])")
![Trefoil]] or three-foiled cusped arch](https://commons.wikimedia.org/wiki/Special:FilePath/Trepassbåge.png?width=200 "Trefoil]] or three-foiled cusped arch")
![[[Horseshoe arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Hästskobåge.png?width=200 "[[Horseshoe arch]]")
![[[Inflexed arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Draperibåge.png?width=200 "[[Inflexed arch]]")
![[[Ogee arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Ogee-shaped arch.svg?width=200 "[[Ogee arch]]")
![Reverse [[ogee arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Karnisbåge.png?width=200 "Reverse [[ogee arch]]")
![Four-centred]] or Tudor arch](https://commons.wikimedia.org/wiki/Special:FilePath/Tudorbåge.png?width=200 "Four-centred]] or Tudor arch")
![[[Parabolic arch]]](https://commons.wikimedia.org/wiki/Special:FilePath/Parabelbåge.png?width=200 "[[Parabolic arch]]")
![Depressed [[Tudor arch]] on [[Layer Marney Tower]] in [[Essex]], England](https://commons.wikimedia.org/wiki/Special:FilePath/N2 layer marney3.jpg?width=200 "Depressed [[Tudor arch]] on [[Layer Marney Tower]] in [[Essex]], England")
![León]], Spain](https://commons.wikimedia.org/wiki/Special:FilePath/Sahagun - Iglesia de San Tirso 06.JPG?width=200 "León]], Spain")
![[[Washington Square Arch]], a triumphal arch in [[Greenwich Village]], [[Manhattan]], [[New York City]]](https://commons.wikimedia.org/wiki/Special:FilePath/Washington Square by Matthew Bisanz.JPG?width=200 "[[Washington Square Arch]], a triumphal arch in [[Greenwich Village]], [[Manhattan]], [[New York City]]")
![[[Delicate Arch]], a natural arch in [[Arches National Park]] near [[Moab, Utah]]](https://commons.wikimedia.org/wiki/Special:FilePath/Delicatearch1.jpg?width=200 "[[Delicate Arch]], a natural arch in [[Arches National Park]] near [[Moab, Utah]]")
![rock balance]] sculpture in the form of an arch](https://commons.wikimedia.org/wiki/Special:FilePath/Arch Balance (cropped).jpg?width=200 "rock balance]] sculpture in the form of an arch")
![Medial longitudinal arch of the human foot]] (''[[Gray's Anatomy]]'')](https://commons.wikimedia.org/wiki/Special:FilePath/Gray290.png?width=200 "Medial longitudinal arch of the human foot]] (''[[Gray's Anatomy]]'')")
![city gate of Ashkelon]], [[Ashkelon]], Israel (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Restored Canaanite city gate of Ashkelon (14341997262).jpg?width=200 "city gate of Ashkelon]], [[Ashkelon]], Israel (2014)")
![Reconstructed [[Ishtar Gate]] of [[Babylon]] in the [[Pergamon Museum]], [[Berlin]] (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Ishtar gate in Pergamon museum in Berlin..jpg?width=200 "Reconstructed [[Ishtar Gate]] of [[Babylon]] in the [[Pergamon Museum]], [[Berlin]] (2014)")
![[[Taq Kasra]] (Archway of [[Ctesiphon]]), [[Salman Pak]], Iraq (1864)](https://commons.wikimedia.org/wiki/Special:FilePath/Ctesiphon-ruin 1864.jpg?width=200 "[[Taq Kasra]] (Archway of [[Ctesiphon]]), [[Salman Pak]], Iraq (1864)")
![Arch of Augustus]], [[Rimini]], [[Emilia-Romagna]], Italy (2015)](https://commons.wikimedia.org/wiki/Special:FilePath/Arch of Augustus at Ariminum, dedicated to the Emperor Augustus by the Roman Senate in 27 BC, the oldest Roman arch which survives, Rimini, Italy (19760798740).jpg?width=200 "Arch of Augustus]], [[Rimini]], [[Emilia-Romagna]], Italy (2015)")
![[[Arch of Gallienus]], [[Rome]] (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Arco di Gallieno o Porta Esquilina - lato interno - Panairjdde.jpg?width=200 "[[Arch of Gallienus]], [[Rome]] (2006)")
![Arch of Hadrian]], [[Athens]], Greece (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/Attica 06-13 Athens 24 Arch of Hadrian.jpg?width=200 "Arch of Hadrian]], [[Athens]], Greece (2013)")
![[[Arch of Constantine]], [[Rome]], commemorating a victory by [[Constantine I]] in 312 AD (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Arch.of.constantine.threequarter.view.arp.jpg?width=200 "[[Arch of Constantine]], [[Rome]], commemorating a victory by [[Constantine I]] in 312 AD (2007)")
![Roman]] design (1998)](https://commons.wikimedia.org/wiki/Special:FilePath/Arc de triomphe frontsimple.jpg?width=200 "Roman]] design (1998)")
![[[Soldiers' and Sailors' Arch]] in the [[Grand Army Plaza]], [[Brooklyn]], [[New York City]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/The Soldiers and Sailors Memorial Arch at Grand Army Plaza.jpg?width=200 "[[Soldiers' and Sailors' Arch]] in the [[Grand Army Plaza]], [[Brooklyn]], [[New York City]] (2007)")
![[[Gateway Arch]] in [[St. Louis, Missouri]]; a monument based on a [[catenary]] arch (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/St Louis night expblend cropped.jpg?width=200 "[[Gateway Arch]] in [[St. Louis, Missouri]]; a monument based on a [[catenary]] arch (2011)")
![The [[Theme Building]] at [[Los Angeles International Airport]], California](https://commons.wikimedia.org/wiki/Special:FilePath/LAX LA.jpg?width=200 "The [[Theme Building]] at [[Los Angeles International Airport]], California")
![[[Nimtali arch]] in Dhaka, Bangladesh](https://commons.wikimedia.org/wiki/Special:FilePath/Asiatic Society Heritage Museum.jpg?width=200 "[[Nimtali arch]] in Dhaka, Bangladesh")
![River Touloubre]] in [[Saint-Chamas]], [[Bouches-du-Rhône]], France (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Pont Flavien Saint Chamas.jpg?width=200 "River Touloubre]] in [[Saint-Chamas]], [[Bouches-du-Rhône]], France (2008)")
![Old stone bridge in [[Kerava]], Finland (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Vanha kivisilta DSC08273 C.JPG?width=200 "Old stone bridge in [[Kerava]], Finland (2011)")
![Bridge of [[Seonamsa Temple]], [[Suncheon]], [[South Jeolla Province]], South Korea (1979)](https://commons.wikimedia.org/wiki/Special:FilePath/선암사.jpg?width=200 "Bridge of [[Seonamsa Temple]], [[Suncheon]], [[South Jeolla Province]], South Korea (1979)")
![River Dee]] in [[Chester]], [[Cheshire]], [[England]], UK (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Grosvenor Bridge Chester3.JPG?width=200 "River Dee]] in [[Chester]], [[Cheshire]], [[England]], UK (2007)")
![Montgomery County]], [[Maryland]] (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Union Arch Bridge MD 2008.jpg?width=200 "Montgomery County]], [[Maryland]] (2008)")
![Hebei Province]], China (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Zhaozhou Bridge.jpg?width=200 "Hebei Province]], China (2007)")
![Elea]], [[Province of Salerno]], [[Campania]], Italy (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Velia.jpg?width=200 "Elea]], [[Province of Salerno]], [[Campania]], Italy (2005)")
![[[Bridge of Sighs]], [[Venice]], Italy (2001)](https://commons.wikimedia.org/wiki/Special:FilePath/Antonio Contin - Ponte dei sospiri (Venice).jpg?width=200 "[[Bridge of Sighs]], [[Venice]], Italy (2001)")
![[[Pont du Gard]], a Roman aqueduct in [[Vers-Pont-du-Gard]], [[Gard]], France (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Pont du Gard BLS.jpg?width=200 "[[Pont du Gard]], a Roman aqueduct in [[Vers-Pont-du-Gard]], [[Gard]], France (2014)")
![Bridge in [[Český Krumlov]], Czech Republic (2004)](https://commons.wikimedia.org/wiki/Special:FilePath/Krumlov13(js).jpg?width=200 "Bridge in [[Český Krumlov]], Czech Republic (2004)")
![Grand Canal]] in [[Venice]], Italy (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Rialto bridge 2011.jpg?width=200 "Grand Canal]] in [[Venice]], Italy (2011)")
![[[Pont de Bercy]] over the River [[Seine]], [[Paris]], carrying the [[Paris Métro]] on its upper deck and a [[boulevard]] extension on its lower deck (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Pont de Bercy Paris FRA 001.JPG?width=200 "[[Pont de Bercy]] over the River [[Seine]], [[Paris]], carrying the [[Paris Métro]] on its upper deck and a [[boulevard]] extension on its lower deck (2006)")
![[[Arlington Memorial Bridge]] over the [[Potomac River]] in [[Washington, D.C.]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Memorial Bridge sunrise.jpg?width=200 "[[Arlington Memorial Bridge]] over the [[Potomac River]] in [[Washington, D.C.]] (2007)")
![Francis Scott Key Bridge]] over the [[Potomac River]] in [[Washington, D.C.]] (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Key Bridge, Washington D.C.jpg?width=200 "Francis Scott Key Bridge]] over the [[Potomac River]] in [[Washington, D.C.]] (2006)")
![Capital Beltway]] over the [[Potomac River]] between [[Alexandria, Virginia]] and [[Oxon Hill, Maryland]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/2007 04 25 - WWB 44.JPG?width=200 "Capital Beltway]] over the [[Potomac River]] between [[Alexandria, Virginia]] and [[Oxon Hill, Maryland]] (2007)")
![[[Arrábida Bridge]] over the [[Douro River]] connecting [[Porto]], and [[Vila Nova de Gaia]], in the [[Norte Region, Portugal]] (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Arrábida_(5458473006).jpg?width=200 "[[Arrábida Bridge]] over the [[Douro River]] connecting [[Porto]], and [[Vila Nova de Gaia]], in the [[Norte Region, Portugal]] (2011)")
![Niagara Falls]], [[Ontario]], Canada (2012)](https://commons.wikimedia.org/wiki/Special:FilePath/Pont Arc.JPG?width=200 "Niagara Falls]], [[Ontario]], Canada (2012)")
![[[Hell Gate Bridge]] over the [[East River]], [[New York City]]](https://commons.wikimedia.org/wiki/Special:FilePath/Hell Gate Bridge by Dave Frieder.jpg?width=200 "[[Hell Gate Bridge]] over the [[East River]], [[New York City]]")
![[[Sydney Harbour Bridge]], [[Sydney]], [[New South Wales]], Australia (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/Sydney Harbour Bridge from Circular Quay.jpg?width=200 "[[Sydney Harbour Bridge]], [[Sydney]], [[New South Wales]], Australia (2010)")
![[[Ludendorff Bridge]] over the [[Rhine River]], [[Remagen]], Germany, showing damage before collapse during the [[Battle of Remagen]] in [[World War II]] (1945)](https://commons.wikimedia.org/wiki/Special:FilePath/Beschädigte Brücke.jpg?width=200 "[[Ludendorff Bridge]] over the [[Rhine River]], [[Remagen]], Germany, showing damage before collapse during the [[Battle of Remagen]] in [[World War II]] (1945)")
![Hunan Province]], China (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Lianxiang bridge.jpg?width=200 "Hunan Province]], China (2007)")
![[[Zhivopisny Bridge]] over the [[Moskva River]], [[Moscow]], Russia (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Живописный мост (4543078369).jpg?width=200 "[[Zhivopisny Bridge]] over the [[Moskva River]], [[Moscow]], Russia (2009)")
![Trinity River]] in [[Dallas]], [[Texas]] (2012)](https://commons.wikimedia.org/wiki/Special:FilePath/The Margaret Hunt Hill Bridge.jpg?width=200 "Trinity River]] in [[Dallas]], [[Texas]] (2012)")
![[[Juscelino Kubitschek Bridge]] crossing [[Paranoá Lake]], [[Brasília]], Brazil (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/BSB Ponte JK Panorama 05 2007 266.jpg?width=200 "[[Juscelino Kubitschek Bridge]] crossing [[Paranoá Lake]], [[Brasília]], Brazil (2007)")
![[[Gateshead Millennium Bridge]] over the [[River Tyne]], [[Newcastle upon Tyne]], [[England]], UK (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Millenium.jpg?width=200 "[[Gateshead Millennium Bridge]] over the [[River Tyne]], [[Newcastle upon Tyne]], [[England]], UK (2005)")
![[[Eiffel Tower]], [[Paris]] (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Tour Eiffel Wikimedia Commons.jpg?width=200 "[[Eiffel Tower]], [[Paris]] (2009)")
![Arch supporting the [[Eiffel Tower]], [[Paris]] (2015)](https://commons.wikimedia.org/wiki/Special:FilePath/Tour Eiffel Nov 2015 inferieur.jpg?width=200 "Arch supporting the [[Eiffel Tower]], [[Paris]] (2015)")
![The second [[Wembley Stadium]] in [[London]], built in 2007 (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Wembley Stadium closeup.jpg?width=200 "The second [[Wembley Stadium]] in [[London]], built in 2007 (2007)")
![San Mamés Stadium]], in [[Bilbao]], arch built in 1953, demolished 2013 (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/San Mames Stadium.JPG?width=200 "San Mamés Stadium]], in [[Bilbao]], arch built in 1953, demolished 2013 (2013)")
![[[St Pancras railway station]], [[London]] (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/20110602 London 05.JPG?width=200 "[[St Pancras railway station]], [[London]] (2011)")
![[[Train shed]] in [[St Pancras railway station]], [[London]] (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/St Pancras railway station, 6 March 2010.jpg?width=200 "[[Train shed]] in [[St Pancras railway station]], [[London]] (2010)")
![Victoria Station]], [[London]] (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Victoria Station - geograph.org.uk - 268162.jpg?width=200 "Victoria Station]], [[London]] (2006)")
![[[Lucerne]] railway station, Switzerland (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/LucerneStation.jpg?width=200 "[[Lucerne]] railway station, Switzerland (2010)")
![Central railway station]], [[Frankfurt]], Germany (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Hauptbahnhof-ffm010.jpg?width=200 "Central railway station]], [[Frankfurt]], Germany (2008)")
![Central railway station]], [[Frankfurt]], Germany (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Frankfurt am Main - Hauptbahnhof - Neues Dach.jpg?width=200 "Central railway station]], [[Frankfurt]], Germany (2005)")
![Arches in Main Concourse, [[Grand Central Terminal]], [[Manhattan]], [[New York City]] (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/NYC Grand Central 2.JPG?width=200 "Arches in Main Concourse, [[Grand Central Terminal]], [[Manhattan]], [[New York City]] (2014)")
![Interior arches in [[Washington Union Station]], [[Washington, D.C.]] (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Union-Sta-interior.jpg?width=200 "Interior arches in [[Washington Union Station]], [[Washington, D.C.]] (2006)")
![Arches in Great Hall, [[Chicago Union Station]], [[Chicago]], [[Illinois]] (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/Chicago (ILL) Union Station, great Hall, 1925.jpg?width=200 "Arches in Great Hall, [[Chicago Union Station]], [[Chicago]], [[Illinois]] (2010)")
![[[Haus der Kulturen der Welt]], [[Berlin]], Germany (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Berlin Kongresshalle BW 1.jpg?width=200 "[[Haus der Kulturen der Welt]], [[Berlin]], Germany (2011)")
![The [[Colosseum]] in [[Rome]] (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/Roma06(js).jpg?width=200 "The [[Colosseum]] in [[Rome]] (2013)")
![Lippspringe]], Germany (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Bl-burg-innenhof-oben.jpg?width=200 "Lippspringe]], Germany (2005)")
![Arches in dining hall at Kings College, [[University of Cambridge]], [[Cambridge]], [[England]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Kings dining hall.JPG?width=200 "Arches in dining hall at Kings College, [[University of Cambridge]], [[Cambridge]], [[England]] (2007)")
![Memorial Hall]], [[Harvard University]], [[Cambridge, Massachusetts]] (2016)](https://commons.wikimedia.org/wiki/Special:FilePath/Annenberg Hall, Memorial Hall, Harvard.jpg?width=200 "Memorial Hall]], [[Harvard University]], [[Cambridge, Massachusetts]] (2016)")
![[[Healy Hall]], [[Georgetown University]], [[Washington, D.C.]] (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Healy Hall 08 2009 Georgetown U 6990.JPG?width=200 "[[Healy Hall]], [[Georgetown University]], [[Washington, D.C.]] (2009)")
![Arches in throne room of [[Neuschwanstein Castle]], [[Bavaria]], Germany (1886 [[photochrom]] print)](https://commons.wikimedia.org/wiki/Special:FilePath/Neuschwanstein throne room 00180u.jpg?width=200 "Arches in throne room of [[Neuschwanstein Castle]], [[Bavaria]], Germany (1886 [[photochrom]] print)")
![Arches in the [[Court of the Lions]], [[Alhambra]], [[Granada]], [[Andalusia]], Spain (2012)](https://commons.wikimedia.org/wiki/Special:FilePath/Alhambra - Patio de Leones - Status 2012.jpg?width=200 "Arches in the [[Court of the Lions]], [[Alhambra]], [[Granada]], [[Andalusia]], Spain (2012)")
![External arches in the [[Court of the Myrtles]], [[Alhambra]], [[Granada]], [[Andalusia]], Spain (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Alhambra-Patio de los Arrayanes.jpg?width=200 "External arches in the [[Court of the Myrtles]], [[Alhambra]], [[Granada]], [[Andalusia]], Spain (2009)")
![Arches inside the North Gallery, [[Court of the Myrtles]], [[Alhambra]], [[Granada]], [[Andalusia]], Spain (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/Serallo, Salon de Embajadores 05 (4400455761).jpg?width=200 "Arches inside the North Gallery, [[Court of the Myrtles]], [[Alhambra]], [[Granada]], [[Andalusia]], Spain (2010)")
![Arches in the nave of the church in [[monastery of Alcobaça]], Portugal (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Igreja, Mosteiro Alcobaça.jpg?width=200 "Arches in the nave of the church in [[monastery of Alcobaça]], Portugal (2008)")
![North facade of [[Chartres Cathedral]], [[Chartres]], France (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Loire Eure Chartres2 tango7174.jpg?width=200 "North facade of [[Chartres Cathedral]], [[Chartres]], France (2008)")
![Arches in choir of [[Chartres Cathedral]], [[Chartres]], France (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/Chartres - Cathédrale 16.JPG?width=200 "Arches in choir of [[Chartres Cathedral]], [[Chartres]], France (2013)")
![Arches in nave of [[Westminster Abbey]], [[City of Westminster]], [[London]] (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Westminster Abbey Interior.jpg?width=200 "Arches in nave of [[Westminster Abbey]], [[City of Westminster]], [[London]] (2006)")
![Arches inside the [[Washington National Cathedral]], [[Washington, D.C.]] (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Arches.jpg?width=200 "Arches inside the [[Washington National Cathedral]], [[Washington, D.C.]] (2005)")
![Interior arches in [[St. Peter's Basilica]], [[Vatican City]] (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Vatican-StPierre-Intérieur1.jpg?width=200 "Interior arches in [[St. Peter's Basilica]], [[Vatican City]] (2009)")
![[[Amir Chakhmaq Complex]], [[Yazd]], Iran (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Amir Chakhmaq left leg arches.jpg?width=200 "[[Amir Chakhmaq Complex]], [[Yazd]], Iran (2014)")
![[[Hagia Sophia]] in [[Istanbul]], Turkey (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/Hagia Sophia Mars 2013.jpg?width=200 "[[Hagia Sophia]] in [[Istanbul]], Turkey (2013)")
![Arches inside the [[Hagia Sophia]] in [[Istanbul]], Turkey (1983)](https://commons.wikimedia.org/wiki/Special:FilePath/Ayasofya-Innenansicht.jpg?width=200 "Arches inside the [[Hagia Sophia]] in [[Istanbul]], Turkey (1983)")
![Arches inside the western upper gallery, [[Hagia Sophia]], [[Istanbul]], Turkey (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Istanbul.Hagia Sophia055.jpg?width=200 "Arches inside the western upper gallery, [[Hagia Sophia]], [[Istanbul]], Turkey (2007)")
![Interior arches in the [[Masjid al-Haram]], [[Mecca]], Saudi Arabia (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Insideofmasjedolharam3.JPG?width=200 "Interior arches in the [[Masjid al-Haram]], [[Mecca]], Saudi Arabia (2008)")
![Roof of [[Masjid al-Haram]], [[Mecca]], Saudi Arabia (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Roof of Masjid al-Haram 02.jpg?width=200 "Roof of [[Masjid al-Haram]], [[Mecca]], Saudi Arabia (2008)")
![Old City of Jerusalem]] (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/Dome of the Rock - 5274885553.jpg?width=200 "Old City of Jerusalem]] (2010)")
![Old City of Jerusalem]] (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Jérusalem - Dôme du Rocher - mosaïque intérieure.jpg?width=200 "Old City of Jerusalem]] (2014)")
![Khyber Pakhtunkhwa province]], Pakistan (2016)](https://commons.wikimedia.org/wiki/Special:FilePath/Lady in arch of Shahi Mosque, Chitral.jpg?width=200 "Khyber Pakhtunkhwa province]], Pakistan (2016)")
![[[Taj Mahal]] in [[Agra]], [[Uttar Pradesh]], India (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Taj Mahal N-UP-A28-a.jpg?width=200 "[[Taj Mahal]] in [[Agra]], [[Uttar Pradesh]], India (2009)")
![The Great Gate (Darwaza-i-rauza)]]: Entrance to grounds of [[Taj Mahal]], [[Agra]], [[Uttar Pradesh]], India (2004)](https://commons.wikimedia.org/wiki/Special:FilePath/B6a agra700.jpg?width=200 "The Great Gate (Darwaza-i-rauza)]]: Entrance to grounds of [[Taj Mahal]], [[Agra]], [[Uttar Pradesh]], India (2004)")
![Arches inside the [[Taj Majal]], [[Agra]], [[Uttar Pradesh]], India](https://commons.wikimedia.org/wiki/Special:FilePath/Inside the Taj Mahal in Agra, India Wellcome V0046065.jpg?width=200 "Arches inside the [[Taj Majal]], [[Agra]], [[Uttar Pradesh]], India")
![Arches in Main Reading Room, [[Thomas Jefferson Building]], [[Library of Congress]], [[Washington, D.C.]] (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/LOC Main Reading Room Highsmith.jpg?width=200 "Arches in Main Reading Room, [[Thomas Jefferson Building]], [[Library of Congress]], [[Washington, D.C.]] (2009)")
![Arches in Great Hall, [[Thomas Jefferson Building]], [[Library of Congress]], [[Washington, D.C.]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Great Hall, Library of Congress Thomas Jefferson Building, Washington, D.C. View of first and second floors, with Minerva mosaic in background. (LOC).jpg?width=200 "Arches in Great Hall, [[Thomas Jefferson Building]], [[Library of Congress]], [[Washington, D.C.]] (2007)")
![[[Art Deco]] arches on [[Chrysler Building]], [[Manhattan]], [[New York City]] (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Chrysler building- top.jpg?width=200 "[[Art Deco]] arches on [[Chrysler Building]], [[Manhattan]], [[New York City]] (2005)")
![[[New York Public Library Main Branch]], [[Manhattan]], [[New York City]] (2016)](https://commons.wikimedia.org/wiki/Special:FilePath/Loz-ny-library-3.png?width=200 "[[New York Public Library Main Branch]], [[Manhattan]], [[New York City]] (2016)")
![Arches inside the entrance of [[New York Public Library Main Branch]], [[Manhattan]], [[New York City]] (2012)](https://commons.wikimedia.org/wiki/Special:FilePath/New York Public Library - 02.jpg?width=200 "Arches inside the entrance of [[New York Public Library Main Branch]], [[Manhattan]], [[New York City]] (2012)")
![Arches in [[Great Hall]], [[Metropolitan Museum of Art]], [[Manhattan]], [[New York City]] (2012)](https://commons.wikimedia.org/wiki/Special:FilePath/The Metropolitan Museum of Art.jpg?width=200 "Arches in [[Great Hall]], [[Metropolitan Museum of Art]], [[Manhattan]], [[New York City]] (2012)")
![Arches in Sculpture Gallery, West Building, [[National Gallery of Art]], [[Washington, D.C.]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/DCgallerywest.jpg?width=200 "Arches in Sculpture Gallery, West Building, [[National Gallery of Art]], [[Washington, D.C.]] (2007)")
![Lincoln Park]], [[San Francisco]], [[California]] (2010)](https://commons.wikimedia.org/wiki/Special:FilePath/California Palace of the Legion of Honour, architecture.JPG?width=200 "Lincoln Park]], [[San Francisco]], [[California]] (2010)")
![Jordan Staircase]], [[Winter Palace]], [[Hermitage Museum]], [[St. Petersburg]], Russia (2015)](https://commons.wikimedia.org/wiki/Special:FilePath/Jordan Staircase 8.JPG?width=200 "Jordan Staircase]], [[Winter Palace]], [[Hermitage Museum]], [[St. Petersburg]], Russia (2015)")
![Arches in Pavilion Hall, Small Hermitage, [[Hermitage Museum]], [[St. Petersburg]], Russia (2015)](https://commons.wikimedia.org/wiki/Special:FilePath/Ermitage Pavilion Hall 11.jpg?width=200 "Arches in Pavilion Hall, Small Hermitage, [[Hermitage Museum]], [[St. Petersburg]], Russia (2015)")
![Arches in Salle du Manège, [[Louvre Palace]], [[Paris]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Palais du Louvre - Salle du Manège -0a.jpg?width=200 "Arches in Salle du Manège, [[Louvre Palace]], [[Paris]] (2007)")
![Arches in [[Galerie des Batailles]], [[Palace of Versailles]], [[Versailles, Yvelines]], [[France]] (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/Château de Versailles - Galerie des Batailles.jpg?width=200 "Arches in [[Galerie des Batailles]], [[Palace of Versailles]], [[Versailles, Yvelines]], [[France]] (2013)")
![Arches in [[Hall of Mirrors]], [[Palace of Versailles]], [[Versailles, Yvelines]], [[France]] (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Chateau Versailles Galerie des Glaces.jpg?width=200 "Arches in [[Hall of Mirrors]], [[Palace of Versailles]], [[Versailles, Yvelines]], [[France]] (2011)")
![Arches in [[Westminster Hall]], [[Palace of Westminster]], [[City of Westminster]], [[London]] (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Westminster Hall 25 May 2011.png?width=200 "Arches in [[Westminster Hall]], [[Palace of Westminster]], [[City of Westminster]], [[London]] (2011)")
![Arches in St. Stevens Hall, [[Palace of Westminster]], [[City of Westminster]], [[London]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Houses of Parliament St. Stephens Hall (Interior) London England.jpg?width=200 "Arches in St. Stevens Hall, [[Palace of Westminster]], [[City of Westminster]], [[London]] (2007)")
![Aljafería Palace]], [[Zaragoza]], Spain (2004)](https://commons.wikimedia.org/wiki/Special:FilePath/La Aljafería - Oratorio 01.JPG?width=200 "Aljafería Palace]], [[Zaragoza]], Spain (2004)")
![Aljafería Palace]], [[Zaragoza]], Spain (2004)](https://commons.wikimedia.org/wiki/Special:FilePath/La Aljafería - Palacio taifa 02.JPG?width=200 "Aljafería Palace]], [[Zaragoza]], Spain (2004)")
![[[Catenary]] arches inside the [[Casa Milà]] in [[Barcelona]], Spain by [[Antoni Gaudí]] (2010}](https://commons.wikimedia.org/wiki/Special:FilePath/Casa Mila interior arches.jpg?width=200 "[[Catenary]] arches inside the [[Casa Milà]] in [[Barcelona]], Spain by [[Antoni Gaudí]] (2010}")
![Rajasthani style]] arches inside the 16th-century [[City Palace, Udaipur]], [[India]] (2013)](https://commons.wikimedia.org/wiki/Special:FilePath/Badi Mahal.jpg?width=200 "Rajasthani style]] arches inside the 16th-century [[City Palace, Udaipur]], [[India]] (2013)")
![Main façade of the [[Itamaraty Palace]] in [[Brasília]], [[Brazil]], decorated with many arches (2005)](https://commons.wikimedia.org/wiki/Special:FilePath/Itamaraty.jpg?width=200 "Main façade of the [[Itamaraty Palace]] in [[Brasília]], [[Brazil]], decorated with many arches (2005)")
![Arches inside the [[National Building Museum]] (formerly Pension Building), [[Washington, D.C.]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/National Building Museum - 6.jpg?width=200 "Arches inside the [[National Building Museum]] (formerly Pension Building), [[Washington, D.C.]] (2007)")
![Old Post Office Building]] in [[Washington, D.C.]] (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Front entrance of Old Post Office, decorated for Christmas.JPG?width=200 "Old Post Office Building]] in [[Washington, D.C.]] (2006)")
![Old Post Office Building]] in [[Washington, D.C.]] (2009)](https://commons.wikimedia.org/wiki/Special:FilePath/Old Post Office (3436194497).jpg?width=200 "Old Post Office Building]] in [[Washington, D.C.]] (2009)")
![[[Bankstown Reservoir]], [[Bankstown]], [[Sydney]], [[New South Wales]], Australia (2018)](https://commons.wikimedia.org/wiki/Special:FilePath/Bankstownreservoir.jpg?width=200 "[[Bankstown Reservoir]], [[Bankstown]], [[Sydney]], [[New South Wales]], Australia (2018)")
![Arches in [[Merzouga]], Morocco (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Overview of Arches.jpg?width=200 "Arches in [[Merzouga]], Morocco (2011)")
![Crypt of the Popes in the [[Catacomb of Callixtus]], [[Rome]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Rom, Calixtus-Katakomben, Krypta der Päpste.jpg?width=200 "Crypt of the Popes in the [[Catacomb of Callixtus]], [[Rome]] (2007)")
![Chinese [[Eastern Han dynasty]] (25–220 AD) tomb chamber, [[Luoyang]] (2008)](https://commons.wikimedia.org/wiki/Special:FilePath/Eastern Han tomb, Luoyang 3.jpg?width=200 "Chinese [[Eastern Han dynasty]] (25–220 AD) tomb chamber, [[Luoyang]] (2008)")
![Washington]] family tomb at [[Mount Vernon]], [[Fairfax County, Virginia]] (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Tomb of George Washington - Mount Vernon.jpg?width=200 "Washington]] family tomb at [[Mount Vernon]], [[Fairfax County, Virginia]] (2014)")
![Rockbridge County]], [[Virginia]] (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Natural Bridge, Rockbridge County, VA.jpg?width=200 "Rockbridge County]], [[Virginia]] (2014)")
![Guangxi Zhuang Autonomous Region]], [[China]] (2012)](https://commons.wikimedia.org/wiki/Special:FilePath/Jiangzhou Natural Bridge.jpg?width=200 "Guangxi Zhuang Autonomous Region]], [[China]] (2012)")
![[[Landscape Arch]], [[Arches National Park]], [[Utah]] (2016)](https://commons.wikimedia.org/wiki/Special:FilePath/Landscape Arch Utah.jpg?width=200 "[[Landscape Arch]], [[Arches National Park]], [[Utah]] (2016)")
![Double O Arch, [[Arches National Park]], [[Utah]] (2007)](https://commons.wikimedia.org/wiki/Special:FilePath/Double-O-Arch Arches National Park 2.jpg?width=200 "Double O Arch, [[Arches National Park]], [[Utah]] (2007)")
![[[Aloba Arch]], [[Ennedi-Est Region]], [[Chad]] (2015)](https://commons.wikimedia.org/wiki/Special:FilePath/Aloba T15b 5831b Stefan Kroepelin.JPG?width=200 "[[Aloba Arch]], [[Ennedi-Est Region]], [[Chad]] (2015)")
![Xinjiang Uygur Autonomous Region]], [[China]] (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/ShiptonsArchHDR.jpg?width=200 "Xinjiang Uygur Autonomous Region]], [[China]] (2011)")
![Galápagos Archipelago]], Pacific Ocean (2006)](https://commons.wikimedia.org/wiki/Special:FilePath/Darwinarch.jpg?width=200 "Galápagos Archipelago]], Pacific Ocean (2006)")
![Shah Abbas Arch Dam (Tagh E Shah Abbas), [[Tabas County]], [[South Khorasan Province]], [[Iran]] (2011)](https://commons.wikimedia.org/wiki/Special:FilePath/Shah Abbas Arch Dam.jpg?width=200 "Shah Abbas Arch Dam (Tagh E Shah Abbas), [[Tabas County]], [[South Khorasan Province]], [[Iran]] (2011)")
![Black Canyon]] of the [[Colorado River]], [[Clark County, Nevada]] and [[Mohave County, Arizona]] (2017)](https://commons.wikimedia.org/wiki/Special:FilePath/2017 Aerial view Hoover Dam 4774.jpg?width=200 "Black Canyon]] of the [[Colorado River]], [[Clark County, Nevada]] and [[Mohave County, Arizona]] (2017)")
![Lozoya River]] near [[Madrid]], [[Spain]] (2014)](https://commons.wikimedia.org/wiki/Special:FilePath/Presa de El Atazar - 01.jpg?width=200 "Lozoya River]] near [[Madrid]], [[Spain]] (2014)")
intrados
[?n'tre?d?s]
¦ noun Architecture the lower or inner curve of an arch. Contrasted with extrados.
Origin
C18: from Fr., from intra- 'on the inside' + dos 'the back' (from L. dorsum).
Intrados
·noun The interior curve of an arch; ·esp., the inner or lower curved face of the whole body of voussoirs taken together. ·see Extrados.
Arches
·- ·pl of Arch, ·noun.
Wikipedia
Arch
An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it.
Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof. Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.
