<P> The building is most notable for its arcaded hypostyle hall , with 856 columns of jasper , onyx , marble , and granite . These were made from pieces of the Roman temple which had occupied the site previously , as well as other destroyed Roman buildings , such as the Mérida amphitheatre . The double arches were a new introduction to architecture , permitting higher ceilings than would otherwise be possible with relatively low columns . The double arches consist of a lower horseshoe arch and an upper semi-circular arch . The famous alternating red and white voussoirs of the arches were inspired by those in the Dome of the Rock. and also resemble those of the Aachen Cathedral , which were built almost at the same time . Horseshoe arches were known in the Iberian Peninsula since late Antiquity , as can be seen on the 3rd - century `` Estela de los Flavios '' , now in the arqueological museum of León . A centrally located honey - combed dome has blue tiles decorated with stars . </P>
<P> The building is most notable for its arcaded hypostyle hall , with 856 columns of jasper , onyx , marble , and granite . These were made from pieces of the Roman temple which had occupied the site previously , as well as other destroyed Roman buildings , such as the Mérida amphitheatre . The double arches were a new introduction to architecture , permitting higher ceilings than would otherwise be possible with relatively low columns . The double arches consist of a lower horseshoe arch and an upper semi-circular arch . The famous alternating red and white voussoirs of the arches were inspired by those in the Dome of the Rock. and also resemble those of the Aachen Cathedral , which were built almost at the same time . Horseshoe arches were known in the Iberian Peninsula since late Antiquity , as can be seen on the 3rd - century `` Estela de los Flavios '' , now in the arqueological museum of León . A centrally located honey - combed dome has blue tiles decorated with stars . </P>
what is the style of arch found at the great mosque at cordoba
what is the style of arch found at the great mosque at cordoba
a lower horseshoe arch an upper semi-circular arch
a lower horseshoe arch an upper semi-circular arch