The
pointed arch, one of the defining attributes of Gothic, appears in Late Roman
Byzantine architecture and the
Sasanian architecture of
Iran during
late antiquity, although the form had been used earlier, as in the possibly 1st century AD
Temple of Bel, Dura Europos in
Roman Mesopotamia. In the Roman context it occurred in church buildings in
Syria and occasional secular structures, like the
Karamagara Bridge in modern
Turkey. In Sassanid architecture parabolic and pointed arches were employed in both palace and sacred construction. A very slightly pointed arch built in 549 exists in the apse of the
Basilica of Sant'Apollinare in Classe in
Ravenna, and slightly more pointed example from a church, built 564 at
Qasr Ibn Wardan in
Roman Syria. Pointed arches' development may have been influenced by the elliptical and parabolic arches frequently employed in Sasanian buildings using
pitched brick vaulting, which obviated any need for wooden
centring and which had for millennia been used in
Mesopotamia and Syria. The oldest pointed arches in
Islamic architecture are in the
Dome of the Rock, completed in 691/2, while some others appear in the
Great Mosque of Damascus, begun in 705. The
Umayyads were responsible for the oldest significantly pointed arches in medieval western Europe, employing them alongside
horseshoe arches in the
Great Mosque of Cordoba, built from 785 and repeatedly extended. The
Abbasid palace at
al-Ukhaidir employed pointed arches in 778 as a dominant theme both structural and decorative throughout the façades and vaults of the complex, while the tomb of
al-Muntasir, built 862, employed a dome with a pointed arch profile.
Abbasid Samarra had many pointed arches, notably its surviving Bab al-ʿAmma (monumental triple gateway). By the 9th century the pointed arch was used in Egypt and North Africa: in the
Nilometer at
Fustat in 861, the 876
Mosque of Ibn Tulun in
Cairo, and the 870s
Great Mosque of Kairouan. Through the 8th and 9th centuries, the pointed arch was employed as standard in secular buildings in architecture throughout the Islamic world. The 10th century
Aljafería at
Zaragoza displays numerous forms of arch, including many pointed arches decorated and elaborated to a level of design sophistication not seen in Gothic architecture for a further two centuries. Increasing military and cultural contacts with the Muslim world, including the
Norman conquest of
Islamic Sicily between 1060 and 1090, the
Crusades, beginning 1096, and the
Islamic presence in Spain, may have influenced medieval Europe's adoption of the pointed arch, although this hypothesis remains controversial. The structural advantages of pointed arches seems first to have been realised in a medieval
Latin Christian context at the abbey church known as
Cluny III at
Cluny Abbey. Begun by abbot
Hugh of Cluny in 1089, the great Romanesque church of
Cluny III was the largest church in the west when completed in 1130
. Kenneth John Conant, who excavated the site of the church's ruins, argued that the architectural innovations of
Cluny III were inspired by the Islamic architecture of Sicily via
Monte Cassino. The Abbey of Monte Cassino was the foundational community of the
Benedictine Order and lay within the
Norman Kingdom of Sicily, . The rib vault with pointed arches was used at Lessay Abbey in Normandy in 1098,
Cefalù Cathedral in
Sicily and at Durham Cathedral in England at about the same time. In those parts of the Western Mediterranean subject to Islamic control or influence, rich regional variants arose, fusing Romanesque, Byzantine and later Gothic traditions with Islamic decorative forms, as seen, for example, in
Monreale and
Cefalù Cathedrals, the
Alcázar of Seville, and
Teruel Cathedral. ==Notes==