The Cathedral and former Great Mosque of Córdoba, in ecclesiastical terms the Catedral de Nuestra Señora de la Asunción, known by the inhabitants of Córdoba as the Mezquita-Catedral, is today a World Heritage Site and the Cathedral of the diocese of Córdoba. The site was originally a pagan temple, then a Visigothic Christian church, before the Umayyad Moors at first converted the building into a mosque, and then built a new mosque on the site. It is located in the Andalusian city of Córdoba, Spain. The Mezquita is regarded as perhaps the most accomplished monument of the Umayyad Caliphate of Córdoba. After the Spanish Reconquista, it once again became a Roman Catholic church, with a plateresque cathedral later inserted into the centre of the large Moorish building (wikipedia).