When we were in Seville, Spain, we visited The Great Mosque in Córdoba. The former Islamic Mosque structure was built by the Umayyad ruler ʿAbd ar-Raḥmān in 784–786. In the 13th century, it was converted into a Christian Cathedral. Its Moorish character was altered in the 16th century, with the interior of a central High Altar and Cruciform Choir. The designs of the Dome of The Mihrah, and the Hypostyle Hall are incredible.