The Caliph is the emir of the emirs, the highest political and religious representative of the land, and the sovereign of all believers. Each and every one of us is a caliph to some extent. With the Caliphate came the brightest moment in al-Andalus. People from the most remote places on the planet came to Córdoba just to visit the local scholars, see the fashion trends, attend concerts, or seek medical consultation. The Caliph’s hoops represent all of that and much more, with their architectural forms, lights and shadows, the arches that unfold and fill with fantasy. A whole architectural imagery that will never disappear from our minds.