San Juan y Todos los Santos (St John and All Saints), also known as Iglesia de la Trinidad (Trinity Church), is a Catholic church located on the Plaza de la Trinidad in Córdoba, Spain. It stands on the site of the former Convento de la Trinidad established shortly after Fernando III conquered the city in 1236. Built in the Baroque style, it forms part of the Historic centre of Córdoba, a UNESCO World Heritage site.t is believed the original church and convent were built on the site of a mosque although nothing remains of it. Nor are there any remains of the Church of San Juan de los Caballeros which remained after the convent was disbanded.There are however records of the roof collapsing in the 16th century and of its subsequent repair funded by Don Martin de Córdoba.After the building again fell into disrepair, it was decided to build a completely new church which was consecrated on Trinity Sunday in 1705. The Baroque building is constructed in the form of a Latin cross with a nave covered by a barrel-vaulted ceiling decorated with painted lunettes.