Almohad Caliphate
The Torre del Oro (Arabic: بُرْج الذَّهَب "burj ad̲h̲-d̲h̲ahab", English: "Tower of Gold") is a dodecagonal military watchtower in Seville, southern Spain. It was erected by the Almohad Caliphate in order to control access to Seville via the Guadalquivir river.