The site was converted from a Visigothic church in 784 by Abd ar-Rahman I.
Over three centuries the mosque was built and extended using repurposed building materials.
The 856 differently sized columns of jasper, onyx, marble and granite are scavanged from Roman buildings and Visigoth churches to form a forest of pillars.
This odd assortment of pillars - some are sunk through the floor, others extended by adding various bases and capitals - are roofed and the building unified by double arches of alternating red and white voussoirs; it's an architectural wonder.
After the Spanish Reconquista in 1236, a Roman Catholic church was inserted indide, and later (in the 15thC) a Baroque cathedral was plunged into the centre of the vast and beautiful mosque.
The two structures create a hybrid whole, agonistic architecture and an inspiration for Parade.
The astonishing dome above the mihrab.
Calle Cardenal Herrero