El arco tiene una expresividad formal como elemento that marks the entrance to the house and a brand is essential in the language of building. There is a huge variety of arch forms in Muslim Spain.
Oldest horseshoe is confined to an equilateral triangle, Visigothic lineage. Was used in the interior and the facade oldest mosque in Cordoba, al-bab-la- Uzara, which appears as an arc discharge hole keystone lintel, following Roman forms, as in the palace of Augustus Tarragona. The arc is always framed by a rectangular frame surrounding square, is enjarjada sternotomy and is eccentric on the top surface the soffit.
Church of San Juan de Baños de Cerrato, Spain (s. VII) . Tracing the arc of the facade according to D. Emilio Camps Cazorla. 
Mosque-Cathedral of Cordoba, Spain (s. VIII-XVI). Drawing the door of St. Stephen as D. Emilio Camps Cazorla. In the great arches of the Medina Azahara Almuzara of arches were used on large pillars that extended his sail in an arc horseshoe fictional and drawn in the stucco coating. Abd al-Rahman III appear in Medina Azahara lobed arches, originating in the shell niches Romans and Visigoths, who generated this extremely decorative, sometimes overlapping with the original horseshoe.
Palatine City of Medina Azahara (936-976) . Large entrance portico.
Palatine City of Medina Azahara (936-976) . Current status and historical recreation of the great portico access. 
Temple of Artemis, Jerash, Jordan (s. II d. C.) . Detail of one of the niches of propyleum. Note the arc-shaped shell that will serve as inspiration for poly-lobed arches.
Palatine City of Medina Azahara (936-976) . Tracing the arc of the walkway lobed, according to D. Emilio Camps Cazorla.
crisscrossing Both types were used for structural purposes to create a dense Mayan capable of withstanding the loads and thrusts of the vaults of the skylights of Al Hakem II. Intersecting arches had already been used with ornamental in Umayyad Syria - (Qasr al-Sharqi Hair). Structural use in the decorative generalized to the entire English Middle Ages.
Mosque-Cathedral of Cordoba, Spain (s . VIII-XVI). Maqsura of Alhaquén II.
Mosque-Cathedral of Cordoba, Spain (s. VIII-XVI). Path of the arches of the Maqsura of Alhaquén II as D. Emilio Camps Cazorla.
Taking the theory of arches crisscrossed "ad infinitum", automatically comes "tsebka" in the late twelfth century, which is already formed in the Patio del Yeso of Seville and the Giralda.
Alcázar of Seville. Almohad palace known as the "Patio del Yeso (s. XII). Elevation of the arcade, and D. Antonio Almagro. 
Giralda in Seville, Spain (1172-1181) . Details sebka cloths.
Giralda in Seville, Spain (1172-1181) . Elevation of sebka cloths, according to D. Antonio Almagro.
The pointed horseshoe arch had great development in the Almohad period, and allowed great flexibility in their use. Valances are lined with plasterboard with tape arches intersecting, overlapping, that the decrease of scale, will become the scalloped Moorish art.
Palacio de la Alhambra (s. XIV) . Hall of the Two Sisters, arch that connects the central room to the bedroom side.
They are called "lambrequins" or mixtilinear those with stalactites hanging profiles, derived from the arch and the stalactite vault, which in its original formula Almoravid period, it would become fashionable years after the Moorish emirate, in the reign of Muhamand V, and also in Christian Spain under John II. Almohads also used the arch decorated with double palms, and also called "curl".
The Christian world-Mudejar own late model created a civil bow. In fact, the horseshoe arch converted after the time of rigor Almohad a form of liturgical significance, only permissible in mosques and baths.
Christian Spain In many mosques, churches become by the simple expedient of cutting the nacelle and the horseshoe arch sobrecurva, transforming it into semicircular stilted. Thus was born this formula, with its decorative scalloped plaster was to become the most widely used arc civil architecture both Christian Spain Moorish, as in the palaces of Moorish art.
Lecture by D. Rafael Manzano Martos on November 17, 2010 at the School of Architecture at the University of Notre Dame, USA.
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