The Mosque–Cathedral of Córdoba (), officially known by its ecclesiastical name of Cathedral of Our Lady of the Assumption (), is the cathedral of the Roman Catholic Diocese of Córdoba dedicated to the Assumption of Mary and located in the Spanish region of Andalusia. Due to its status as a former Islamic mosque, it is also known as the Mezquita (; 'mosque' in Spanish) and as the Great Mosque of Córdoba. According to traditional accounts, a Visigothic church, the Catholic Christian Basilica of Saint Vincent of Saragossa, originally stood on the site of the current Mosque-Cathedral, although the historicity of this narrative has been questioned by scholars. The Great Mosque was constructed on the orders of Abd ar-Rahman I in 785, when Córdoba was the capital of the Muslim-controlled region of Al-Andalus. It was expanded multiple times afterwards under Abd ar-Rahman's successors up to the late 10th century. Among the most notable additions, Abd ar-Rahman III added a minaret (finished in 958) and his son Al-Hakam II added a richly-decorated new mihrab and maqsura section (finished in 971). The mosque was converted to a cathedral in 1236 when Córdoba was captured by the Christian forces of Castile during the Reconquista. The structure itself underwent only minor modifications until a major building project in the 16th century inserted a new Renaissance cathedral nave and transept into the center of the building. The former minaret, which had been converted to a bell tower, was also significantly remodelled around this time. Starting in the 19th century, modern restorations have in turn led to the recovery and study of some of the building's Islamic-era elements. Today, the building continues to serve as the city's cathedral and Mass is celebrated therein daily. The mosque structure is an important monument in the history of Islamic architecture and was highly influential on the subsequent "Moorish" architecture of the western Mediterranean regions of the Muslim world. It is also one of Spain's major historic monuments and tourist attractions, as well as a UNESCO World Heritage Site since 1984. History Claims of earlier Roman Temple A claim that the site of the mosque-cathedral was once a Roman temple dedicated to Janus dates as far back as Pablo de Céspedes and is sometimes still repeated today. However, Robert Knapp, in his overview of Roman-era Córdoba, has dismissed this claim as speculation based on a misunderstanding of Roman milestones found in