The emblematic double arches of the Mezquita Mosque-Cathedral in Cordoba: the lower arch is Moorish horseshoe-shaped while the upper arch is the more traditional Roman round. Of the original 1293 columns, 856 survived. Despite the additions during the Christian period, 70% of the original mosque survived. Since 1236, the Mezquita in Cordoba has been a Roman Catholic Church with mass said daily. Although the local still call it the mosque, no Islamic prayers are allowed.