Mezquita de Córdoba
The Mezquita (Spanish for "mosque") of Cordoba is a Roman Catholic cathedral. It used to be a mosque situated in the Andalusian city of Córdoba, Spain. Primarily, the site had borne a temple, then a Christian cathedral. Under the rule of Islam, it was built as the second-largest mosque in the world, and is perhaps the most accomplished monument of the Umayyad dynasty of Cordoba. After the Spanish Reconquista, it was transformed into a church, and some of the Islamic columns and arcs were replaced by a basilica in early Baroque style. Today it houses the main church of the diocese of Cordoba in Spain.