The oldest part of the cathedral is the Door of Forgiveness from the late 13th or early 14th century, which may have been reassembled later. It was probably the door of the primitive chapel which stood on the site of today's cathedral church. The cathedral was built in stages, combining the Gothic and Renaissance styles. The apse dates to the early 15th century, the eastern section of the nave is from 1514 while the remainder was completed c. 1580. The cathedral consists principally of a huge nave, high, long and wide, the second largest in Spain after that of Girona Cathedral. The Chapel of the Virgin and the sacristy are in the 17th-century Baroque style. The tower, rebuilt in 1825, has recently been restored. During the Spanish civil war, the cathedral was used as a military garage. As a result, many of its treasures were stolen or destroyed. The architectural style of the Perdón doorway is in Gothic with Romanesque features while the Renaissance style is seen in the southern doorway; Perdón doorway is conjectured to belong to the reign of Alfonso X. The tower built in the 19th century is in stone masonry and it is in four tiers.
Interior
The magnificent Baroque altarpiece is the work of Giraldo de Merlo and his son-in-law, the painter Juan de Hasten. The work was continued by the brothers Cristóbal and Pedro Ruiz Delvira who charged Juan de Villaseca to implement a design created by Andrés de la Concha, completed in 1616. The altarpiece is dedicated to the Virgen of the Prado, the patron saint of Ciudad Real. The carved walnut pews are from the first half of the 18th century. The Sacristy has many paintings. There is also a chest of drawers made in a Baroque style. The church of Santa Maria del Prado gained the status of cathedral by papal bull in 1875.
Restorations
1967 - First restoration of the bells: bells recast, providing them with metal yokes
1983 - 1986 : Restoration of the tower
1987 - 1988 - Second restoration of the bells, recast and new mechanization
1992 - Third restoration of the bells: minor welding hood
1998 - 2002 - Restoration of the facades and the ceiling of the old sacristy
2001 - Restoration of the organ
2003 - 2004 - Restoration of the altarpiece
2009 - 2010 - Restoration of the Virgen del Prado Chapel