Seville Cathedral  The Cathedral of Saint Mary of the See (), better known as Seville Cathedral, is a Roman Catholic cathedral in Seville, Andalusia, Spain. It was registered in 1987 by UNESCO as a World Heritage Site, along with the adjoining Alcázar palace complex and the General Archive of the Indies. "See" refers to the episcopal see, i.e., the bishop's ecclesiastical jurisdiction. It is the fourth-largest church in the world (its size remains a matter of debate) as well as the largest Gothic church. After its completion in the early 16th century, Seville Cathedral supplanted Hagia Sophia as the largest cathedral in the world, a title the Byzantine church had held for nearly a thousand years. The total area occupied by the building is . The Gothic section alone has a length of , a width of , and its maximum height in the center of the transept is . The total height of the Giralda tower from the ground to the weather vane is . Since the world's two largest churches (St. Peter's Basilica and the Basilica of the National Shrine of the Immaculate Conception) are not the seats of bishops, Seville Cathedral is still the largest cathedral in the world. Seville Cathedral was the site of the baptism of Infant Juan of Aragon in 1478, only son of the Catholic Monarchs Ferdinand II of Aragon and Isabella I of Castile. Its royal chapel holds the remains of the city's conqueror Ferdinand III of Castile, his son and heir Alfonso the Wise and their descendant king Peter the Just. The funerary monuments for cardinals Juan de Cervantes and Pedro González de Mendoza are located among its chapels. Christopher Columbus and his son Diego are also buried in the cathedral. The Archbishop's Palace is located on the northeastern side of the cathedral. The Almohad caliph Abu Yaqub Yusuf ordered the construction of a new grand mosque for the city in 1172 on the south end of the city. The new mosque was dedicated in 1182, but was not completed until 1198. It supplanted the one built between 829 and 830 by Umar Ibn Adabbas on the site of the present-day collegiate church of Divino Salvador as the main prayer hall in the city. Larger and closer to the city's alcázar, the mosque was designed by the renowned architect Ahmad ben Basso as a rectangular building with a surface of over , including a minaret and ablutions courtyard.